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[Thinkers](https://miscsubjects.com/a/oip-thinkers) › **Eric Brewer — The CAP Theorem**\n>\n> **Shelf:** Thinkers · **Traversal:** self-explaining · hierarchical · voxel-ready\n> **Machine root:** [OIP tree](https://miscsubjects.com/api/dispatch?map=1&format=markdown) · [Registry](https://miscsubjects.com/api/dispatch?registry=1)","status":"active","vx_hash":"912dcc8b0de9ea041792facf5ae2f8f8f744a22b68bd4390aee63ac8080e32a5","semantic_hash":null,"version_hash":null,"version":1,"sources":[],"falsifiers":[],"tier":null,"backed":null,"transcludes":null,"chain_head":"3b40852e2f9726063af1bc29959a53fe0552637f4a28ec28f29ff91b291785b9","chain_length":1,"chain":[{"n":1,"op":"genesis","ts":"2026-07-17T02:42:38.618Z","actor":"owner","text_sha":"484a9285c63e7afcf982d220ccf17b0ee617afba72970698877960a77758498d","detail":{"divided_from":"body","block":2,"kind":"quote"},"prev":"genesis","hash":"3b40852e2f9726063af1bc29959a53fe0552637f4a28ec28f29ff91b291785b9"}],"claim_ids":[],"last_op":{"op":"genesis","actor":"owner","ts":"2026-07-17T02:42:38.618Z"},"consolidated_into":null,"stable_url":"https://miscsubjects.com/i/div/thinker-eric-brewer/d2"},{"id":"d3","kind":"h","type":null,"order":3,"text":"# Eric Brewer — The CAP 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thinker-eric-brewer","status":"active","vx_hash":"01b9f9de21ee0b393f3c10fc6ad3f139e3352890eb670004598935ef85d5f3aa","semantic_hash":null,"version_hash":null,"version":1,"sources":[],"falsifiers":[],"tier":null,"backed":null,"transcludes":null,"chain_head":"d0138201f647032800cf35c5867abcc13cfa9946326416c1524a6e0b9574b035","chain_length":1,"chain":[{"n":1,"op":"genesis","ts":"2026-07-17T02:42:38.618Z","actor":"owner","text_sha":"718699458543f66b9e043d1a00b09427c0a933987eec9157205c481552a21b71","detail":{"divided_from":"body","block":4,"kind":"h"},"prev":"genesis","hash":"d0138201f647032800cf35c5867abcc13cfa9946326416c1524a6e0b9574b035"}],"claim_ids":[],"last_op":{"op":"genesis","actor":"owner","ts":"2026-07-17T02:42:38.618Z"},"consolidated_into":null,"stable_url":"https://miscsubjects.com/i/div/thinker-eric-brewer/d4"},{"id":"d5","kind":"p","type":null,"order":5,"text":"**What this page is:** An explanation of a theorem that governs all distributed computer systems.\n**What it explains:** The CAP theorem and why distributed systems must choose between consistency and availability.\n**Why read it:** To understand why no distributed database can be fully consistent and fully available at the same 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It was formally proved in 2002 by Seth Gilbert and Nancy Lynch of MIT.","status":"active","vx_hash":"2ab76165b1bd3d6d7c2a452270b569402c9726301ad833f87f553fbc826d2407","semantic_hash":null,"version_hash":null,"version":1,"sources":[],"falsifiers":[],"tier":null,"backed":null,"transcludes":null,"chain_head":"899769d9ed111f0979a3d3a0d14ea21e4295d0b97502e9ba99f573acc4c8bc2b","chain_length":1,"chain":[{"n":1,"op":"genesis","ts":"2026-07-17T02:42:38.618Z","actor":"owner","text_sha":"50832e049b85cae71525be9ccbceb2eb5391dc338dcaff1a43aafcd34ba993f8","detail":{"divided_from":"body","block":7,"kind":"p"},"prev":"genesis","hash":"899769d9ed111f0979a3d3a0d14ea21e4295d0b97502e9ba99f573acc4c8bc2b"}],"claim_ids":[],"last_op":{"op":"genesis","actor":"owner","ts":"2026-07-17T02:42:38.618Z"},"consolidated_into":null,"stable_url":"https://miscsubjects.com/i/div/thinker-eric-brewer/d7"},{"id":"d8","kind":"p","type":null,"order":8,"text":"CAP names three properties of a distributed data store (a system where data is stored across multiple connected computers):","status":"active","vx_hash":"e0c219b59637125ae25e6130836244feb22e97f82c05b56df1dbc7fcae13366c","semantic_hash":null,"version_hash":null,"version":1,"sources":[],"falsifiers":[],"tier":null,"backed":null,"transcludes":null,"chain_head":"0249226fd7d65929ef4338bc08b51ed1c323524f12835df9071c3bfec0182d5a","chain_length":1,"chain":[{"n":1,"op":"genesis","ts":"2026-07-17T02:42:38.618Z","actor":"owner","text_sha":"39715eec523e125c6de9a5171f400b5d225a70e409cdacf94ab6ce11b2164ba4","detail":{"divided_from":"body","block":8,"kind":"p"},"prev":"genesis","hash":"0249226fd7d65929ef4338bc08b51ed1c323524f12835df9071c3bfec0182d5a"}],"claim_ids":[],"last_op":{"op":"genesis","actor":"owner","ts":"2026-07-17T02:42:38.618Z"},"consolidated_into":null,"stable_url":"https://miscsubjects.com/i/div/thinker-eric-brewer/d8"},{"id":"d9","kind":"list","type":null,"order":9,"text":"- **Consistency (C):** Every read receives the most recent write. All nodes (individual computers in the system) see the same data at the same time.\n- **Availability (A):** Every request receives a non-error response. The system responds to every query, even if the data is not the most recent.\n- **Partition tolerance (P):** The system continues to operate despite network partitions — situations where messages between nodes are lost or delayed.","status":"active","vx_hash":"166093513352c145db159d7773526681760926b600845bf15e4bd59ceef14a9a","semantic_hash":null,"version_hash":null,"version":1,"sources":[],"falsifiers":[],"tier":null,"backed":null,"transcludes":null,"chain_head":"3cee5f1346be00653828e0cf2979144bb14f238763cd4749a9ccaa2f1a019ed3","chain_length":1,"chain":[{"n":1,"op":"genesis","ts":"2026-07-17T02:42:38.618Z","actor":"owner","text_sha":"96ef818dedc8c64f3a25afd4a8f117a7dfda0fc097e7e99a825020bd9b8d4f93","detail":{"divided_from":"body","block":9,"kind":"list"},"prev":"genesis","hash":"3cee5f1346be00653828e0cf2979144bb14f238763cd4749a9ccaa2f1a019ed3"}],"claim_ids":[],"last_op":{"op":"genesis","actor":"owner","ts":"2026-07-17T02:42:38.618Z"},"consolidated_into":null,"stable_url":"https://miscsubjects.com/i/div/thinker-eric-brewer/d9"},{"id":"d10","kind":"p","type":null,"order":10,"text":"The theorem states: in a distributed data store, you can guarantee at most two of the three properties.","status":"active","vx_hash":"c786169edc2525a13faa02a8aed50a0b295b6d47a6d0f509c25ff0bf070c1879","semantic_hash":null,"version_hash":null,"version":1,"sources":[],"falsifiers":[],"tier":null,"backed":null,"transcludes":null,"chain_head":"d8ed96f2be4b617f9b9e23cd39357ba120b5c1cc57dec2b69b1ff712594107d0","chain_length":1,"chain":[{"n":1,"op":"genesis","ts":"2026-07-17T02:42:38.618Z","actor":"owner","text_sha":"e6bbad343391ac6dad2b9af414a722a864483d46806f9dec631d41784cb5d5c9","detail":{"divided_from":"body","block":10,"kind":"p"},"prev":"genesis","hash":"d8ed96f2be4b617f9b9e23cd39357ba120b5c1cc57dec2b69b1ff712594107d0"}],"claim_ids":[],"last_op":{"op":"genesis","actor":"owner","ts":"2026-07-17T02:42:38.618Z"},"consolidated_into":null,"stable_url":"https://miscsubjects.com/i/div/thinker-eric-brewer/d10"},{"id":"d11","kind":"h","type":null,"order":11,"text":"### Why It Matters","status":"active","vx_hash":"862197f02a37896d61ca6436bb88a2baf3df3a8d50679fabd19bf65bccc2e745","semantic_hash":null,"version_hash":null,"version":1,"sources":[],"falsifiers":[],"tier":null,"backed":null,"transcludes":null,"chain_head":"66e34e4c73a8ed323ab1108cbeeea87ff895a58e07f8730c7aa8cdb5cabd5893","chain_length":1,"chain":[{"n":1,"op":"genesis","ts":"2026-07-17T02:42:38.618Z","actor":"owner","text_sha":"a4819b750e1f362046048e66a2633f32de13b891cbecc89e4945f5a4a78ff266","detail":{"divided_from":"body","block":11,"kind":"h"},"prev":"genesis","hash":"66e34e4c73a8ed323ab1108cbeeea87ff895a58e07f8730c7aa8cdb5cabd5893"}],"claim_ids":[],"last_op":{"op":"genesis","actor":"owner","ts":"2026-07-17T02:42:38.618Z"},"consolidated_into":null,"stable_url":"https://miscsubjects.com/i/div/thinker-eric-brewer/d11"},{"id":"d12","kind":"p","type":null,"order":12,"text":"The theorem matters because network partitions (P) are inevitable in real systems. Cables fail. Routers reboot. Data centers lose connectivity. If a partition occurs, the system must choose: either preserve consistency (C) by refusing some requests, or preserve availability (A) by serving possibly stale data.","status":"active","vx_hash":"cb03a380a6dc31d317542c0556dec3a0ea9bd4f471c1db73b0580b03ddf40eb1","semantic_hash":null,"version_hash":null,"version":1,"sources":[],"falsifiers":[],"tier":null,"backed":null,"transcludes":null,"chain_head":"7bd77d492fc719cbe87dcbb7ffa6ca67fc48a34e6f67a61210019bafd568fe75","chain_length":1,"chain":[{"n":1,"op":"genesis","ts":"2026-07-17T02:42:38.618Z","actor":"owner","text_sha":"1237c82f0b3b5f1ba7f10a40621ef3d3feab23080566952de53a004b9c2ad965","detail":{"divided_from":"body","block":12,"kind":"p"},"prev":"genesis","hash":"7bd77d492fc719cbe87dcbb7ffa6ca67fc48a34e6f67a61210019bafd568fe75"}],"claim_ids":[],"last_op":{"op":"genesis","actor":"owner","ts":"2026-07-17T02:42:38.618Z"},"consolidated_into":null,"stable_url":"https://miscsubjects.com/i/div/thinker-eric-brewer/d12"},{"id":"d13","kind":"p","type":null,"order":13,"text":"This is not a technological limitation that better engineering will solve. It is a logical limit proved by the Gilbert-Lynch proof.","status":"active","vx_hash":"745ad40f250b514984276db0a0eb26ac771c9d9c817cc3e5a3891e6ab7ea0478","semantic_hash":null,"version_hash":null,"version":1,"sources":[],"falsifiers":[],"tier":null,"backed":null,"transcludes":null,"chain_head":"37f509560e57b459c3abddc01f35aa36745bbad82efde8f88acefc4e195deb4a","chain_length":1,"chain":[{"n":1,"op":"genesis","ts":"2026-07-17T02:42:38.618Z","actor":"owner","text_sha":"be0dab5fb9f0bc1bd05de4874e800fe7403f289c65de2128dd2521c51cfaffc2","detail":{"divided_from":"body","block":13,"kind":"p"},"prev":"genesis","hash":"37f509560e57b459c3abddc01f35aa36745bbad82efde8f88acefc4e195deb4a"}],"claim_ids":[],"last_op":{"op":"genesis","actor":"owner","ts":"2026-07-17T02:42:38.618Z"},"consolidated_into":null,"stable_url":"https://miscsubjects.com/i/div/thinker-eric-brewer/d13"},{"id":"d14","kind":"h","type":null,"order":14,"text":"### The Key Idea: The Trade-off","status":"active","vx_hash":"dae66f3fa54f63f82f34acb245f44cafc6853eff7b1b501828e9bd9451ef8041","semantic_hash":null,"version_hash":null,"version":1,"sources":[],"falsifiers":[],"tier":null,"backed":null,"transcludes":null,"chain_head":"04037f48789313e06a33101d99787596d22adf93d256d8cb4665638bf9e84838","chain_length":1,"chain":[{"n":1,"op":"genesis","ts":"2026-07-17T02:42:38.618Z","actor":"owner","text_sha":"c988e687299faad8554b0c18da6562eaf51636976cc075f0a1ca7d6e4a140caa","detail":{"divided_from":"body","block":14,"kind":"h"},"prev":"genesis","hash":"04037f48789313e06a33101d99787596d22adf93d256d8cb4665638bf9e84838"}],"claim_ids":[],"last_op":{"op":"genesis","actor":"owner","ts":"2026-07-17T02:42:38.618Z"},"consolidated_into":null,"stable_url":"https://miscsubjects.com/i/div/thinker-eric-brewer/d14"},{"id":"d15","kind":"p","type":null,"order":15,"text":"If the network partitions (P), you must choose between consistency (C) and availability (A). You cannot have both.","status":"active","vx_hash":"7f74ff6dc63ea10bb8de9805f24a4760a6f34e89c5a87b0dd70738957c6f0e71","semantic_hash":null,"version_hash":null,"version":1,"sources":[],"falsifiers":[],"tier":null,"backed":null,"transcludes":null,"chain_head":"254ec7d065f70f5d078c6e3aa22abd435872985b36cfb7e6ee2ddfcbe338435e","chain_length":1,"chain":[{"n":1,"op":"genesis","ts":"2026-07-17T02:42:38.618Z","actor":"owner","text_sha":"3cb1dd0f223891df80bdeff99eb1cbe25b02615e3e86e923dd45f64049c91e4e","detail":{"divided_from":"body","block":15,"kind":"p"},"prev":"genesis","hash":"254ec7d065f70f5d078c6e3aa22abd435872985b36cfb7e6ee2ddfcbe338435e"}],"claim_ids":[],"last_op":{"op":"genesis","actor":"owner","ts":"2026-07-17T02:42:38.618Z"},"consolidated_into":null,"stable_url":"https://miscsubjects.com/i/div/thinker-eric-brewer/d15"},{"id":"d16","kind":"list","type":null,"order":16,"text":"- Choose CP: The system blocks writes until consistency is restored. Some requests fail. The system is consistent but not fully available.\n- Choose AP: The system accepts all writes and serves all reads. Some responses contain stale data. The system is available but not fully consistent.","status":"active","vx_hash":"8892d63a6a9d70712c23fab95255fcfc277e9cc33e3c6b48c04e545ce8d5cf77","semantic_hash":null,"version_hash":null,"version":1,"sources":[],"falsifiers":[],"tier":null,"backed":null,"transcludes":null,"chain_head":"8e474fa2f01256393a9cb153081741f8eda39303e528c9acdb9d031adb6a2acf","chain_length":1,"chain":[{"n":1,"op":"genesis","ts":"2026-07-17T02:42:38.618Z","actor":"owner","text_sha":"3246aeb79fa0be37b6339bd018d71d575230d33906898ee03bfb04eb0073cd0f","detail":{"divided_from":"body","block":16,"kind":"list"},"prev":"genesis","hash":"8e474fa2f01256393a9cb153081741f8eda39303e528c9acdb9d031adb6a2acf"}],"claim_ids":[],"last_op":{"op":"genesis","actor":"owner","ts":"2026-07-17T02:42:38.618Z"},"consolidated_into":null,"stable_url":"https://miscsubjects.com/i/div/thinker-eric-brewer/d16"},{"id":"d17","kind":"p","type":null,"order":17,"text":"Most real-world distributed systems choose AP and handle consistency asynchronously (in the background). They accept that different nodes may see different data for a short period, and they resolve differences later.","status":"active","vx_hash":"26119812fed89dd19247ff105c613ed733549327113b7e56d8e7953fedbc619a","semantic_hash":null,"version_hash":null,"version":1,"sources":[],"falsifiers":[],"tier":null,"backed":null,"transcludes":null,"chain_head":"4a415d557ad3a0733b5507976a6dd942d7587a19b3dee4629fde10177429974f","chain_length":1,"chain":[{"n":1,"op":"genesis","ts":"2026-07-17T02:42:38.618Z","actor":"owner","text_sha":"f041fc82a344faee8637f3ae5b922b127cfaab08d99ebecd3dd7789e92b1c5f8","detail":{"divided_from":"body","block":17,"kind":"p"},"prev":"genesis","hash":"4a415d557ad3a0733b5507976a6dd942d7587a19b3dee4629fde10177429974f"}],"claim_ids":[],"last_op":{"op":"genesis","actor":"owner","ts":"2026-07-17T02:42:38.618Z"},"consolidated_into":null,"stable_url":"https://miscsubjects.com/i/div/thinker-eric-brewer/d17"},{"id":"d18","kind":"h","type":null,"order":18,"text":"### What Brewer Got Right","status":"active","vx_hash":"9f880981d231afe453729a3ad3ee21b1f3c0b731ac062da07f20d6ce8615bbe4","semantic_hash":null,"version_hash":null,"version":1,"sources":[],"falsifiers":[],"tier":null,"backed":null,"transcludes":null,"chain_head":"3015e71f27d27baa267e1c09c4d14760fb213b09dbb15502c2952c729f280aae","chain_length":1,"chain":[{"n":1,"op":"genesis","ts":"2026-07-17T02:42:38.618Z","actor":"owner","text_sha":"77af7a2889ffc945f97cf3c980000342bce146eff1f369955610551c14189d2c","detail":{"divided_from":"body","block":18,"kind":"h"},"prev":"genesis","hash":"3015e71f27d27baa267e1c09c4d14760fb213b09dbb15502c2952c729f280aae"}],"claim_ids":[],"last_op":{"op":"genesis","actor":"owner","ts":"2026-07-17T02:42:38.618Z"},"consolidated_into":null,"stable_url":"https://miscsubjects.com/i/div/thinker-eric-brewer/d18"},{"id":"d19","kind":"list","type":null,"order":19,"text":"- Identified the three properties that matter in distributed systems design.\n- Showed that the choice between them is a logical necessity, not an engineering failure.\n- Forced system designers to be explicit about which properties they prioritize.","status":"active","vx_hash":"6901470063915720e4c7f5a2e9f270048d6d890165be809bf1395d7b52afe281","semantic_hash":null,"version_hash":null,"version":1,"sources":[],"falsifiers":[],"tier":null,"backed":null,"transcludes":null,"chain_head":"94cdb548566750927b2983fd077256baff32e4ce53d7718b92fe1d94afb1b49a","chain_length":1,"chain":[{"n":1,"op":"genesis","ts":"2026-07-17T02:42:38.618Z","actor":"owner","text_sha":"feb75a3cc53f368ffbbb0850317eec774a0b176081d7a258e2429937c5c42578","detail":{"divided_from":"body","block":19,"kind":"list"},"prev":"genesis","hash":"94cdb548566750927b2983fd077256baff32e4ce53d7718b92fe1d94afb1b49a"}],"claim_ids":[],"last_op":{"op":"genesis","actor":"owner","ts":"2026-07-17T02:42:38.618Z"},"consolidated_into":null,"stable_url":"https://miscsubjects.com/i/div/thinker-eric-brewer/d19"},{"id":"d20","kind":"h","type":null,"order":20,"text":"### What Brewer Got Wrong or Left Unfinished","status":"active","vx_hash":"99df2b0e501fc576b8835556b735e87ba2e6bdf86fb283ce0c2b9796780837f5","semantic_hash":null,"version_hash":null,"version":1,"sources":[],"falsifiers":[],"tier":null,"backed":null,"transcludes":null,"chain_head":"275705d7b84aa6899b11e0429aedb53d9694ecd3c4108121d761ba7b50f25cb5","chain_length":1,"chain":[{"n":1,"op":"genesis","ts":"2026-07-17T02:42:38.618Z","actor":"owner","text_sha":"86f2195537200451752fb6e65ecf2802b312e616f57e3e7a5035448478ff386f","detail":{"divided_from":"body","block":20,"kind":"h"},"prev":"genesis","hash":"275705d7b84aa6899b11e0429aedb53d9694ecd3c4108121d761ba7b50f25cb5"}],"claim_ids":[],"last_op":{"op":"genesis","actor":"owner","ts":"2026-07-17T02:42:38.618Z"},"consolidated_into":null,"stable_url":"https://miscsubjects.com/i/div/thinker-eric-brewer/d20"},{"id":"d21","kind":"list","type":null,"order":21,"text":"- The theorem is often stated as \"pick two of three,\" which implies you could build a system that is CA (consistent and available) but not partition-tolerant. In practice, network partitions are unavoidable, so every real system must tolerate partitions. The actual choice is between CP and AP, not among all three pairs.\n- The theorem does not quantify the trade-off. It does not say how much consistency you lose for a given gain in availability.\n- Brewer later noted that the theorem describes a binary at partition time, but real systems operate on a spectrum between strong consistency and eventual consistency.","status":"active","vx_hash":"948099a03619677fc442fec29eb94a9f066a1c9129f8df11804c68f562d52546","semantic_hash":null,"version_hash":null,"version":1,"sources":[],"falsifiers":[],"tier":null,"backed":null,"transcludes":null,"chain_head":"201dbe50c3bdfbc5ae6b812bc672604196889de2a93628f307b7b923fcce1317","chain_length":1,"chain":[{"n":1,"op":"genesis","ts":"2026-07-17T02:42:38.618Z","actor":"owner","text_sha":"63e66b20d2ab81f88e85c939d3f1d2208ea9dc1fcc7f2297fa6948cb0629cda9","detail":{"divided_from":"body","block":21,"kind":"list"},"prev":"genesis","hash":"201dbe50c3bdfbc5ae6b812bc672604196889de2a93628f307b7b923fcce1317"}],"claim_ids":[],"last_op":{"op":"genesis","actor":"owner","ts":"2026-07-17T02:42:38.618Z"},"consolidated_into":null,"stable_url":"https://miscsubjects.com/i/div/thinker-eric-brewer/d21"},{"id":"d22","kind":"h","type":null,"order":22,"text":"### How It Connects to Other Ideas","status":"active","vx_hash":"54b4c4a55ffdee6043e8ef55286a2c9bdcd53a60160ad1d72167380aab07084b","semantic_hash":null,"version_hash":null,"version":1,"sources":[],"falsifiers":[],"tier":null,"backed":null,"transcludes":null,"chain_head":"be1fcce9cf5f5c09069705a9a5bd235f76178bd8ccfa35318b42eb832520660b","chain_length":1,"chain":[{"n":1,"op":"genesis","ts":"2026-07-17T02:42:38.618Z","actor":"owner","text_sha":"d46b9404a4eefce56f38804b116b03e5d09c1a5456b8f30b0a70a7201a961b5e","detail":{"divided_from":"body","block":22,"kind":"h"},"prev":"genesis","hash":"be1fcce9cf5f5c09069705a9a5bd235f76178bd8ccfa35318b42eb832520660b"}],"claim_ids":[],"last_op":{"op":"genesis","actor":"owner","ts":"2026-07-17T02:42:38.618Z"},"consolidated_into":null,"stable_url":"https://miscsubjects.com/i/div/thinker-eric-brewer/d22"},{"id":"d23","kind":"list","type":null,"order":23,"text":"- **ACID vs. BASE:** ACID (Atomicity, Consistency, Isolation, Durability) describes the properties of traditional relational databases, which prioritize consistency. BASE (Basically Available, Soft state, Eventual consistency) describes the properties of many distributed databases, which prioritize availability. CAP explains why BASE exists.\n- **Consensus protocols (Paxos, Raft):** These algorithms achieve strong consistency in distributed systems by requiring a majority of nodes to agree before committing a write. They implement the CP choice. CAP explains why these protocols are necessary and why they add latency.","status":"active","vx_hash":"107684e127b0ff9552cf5f2497acde143cf136a7bb3fa499b5bf9c5d11b8100f","semantic_hash":null,"version_hash":null,"version":1,"sources":[],"falsifiers":[],"tier":null,"backed":null,"transcludes":null,"chain_head":"bb875d7675def5a8e2756998e4535faa8f6838e10b20e465361b212e96751f6b","chain_length":1,"chain":[{"n":1,"op":"genesis","ts":"2026-07-17T02:42:38.618Z","actor":"owner","text_sha":"99b66b14437bdc6aab5d42282156c5548e566079922e08ec3970378848c0a40d","detail":{"divided_from":"body","block":23,"kind":"list"},"prev":"genesis","hash":"bb875d7675def5a8e2756998e4535faa8f6838e10b20e465361b212e96751f6b"}],"claim_ids":[],"last_op":{"op":"genesis","actor":"owner","ts":"2026-07-17T02:42:38.618Z"},"consolidated_into":null,"stable_url":"https://miscsubjects.com/i/div/thinker-eric-brewer/d23"},{"id":"d24","kind":"h","type":null,"order":24,"text":"### Sources","status":"active","vx_hash":"b9e3924354d3b1cc7c44f01b5940a625688ef3860f8d24b51055f5677e02aca5","semantic_hash":null,"version_hash":null,"version":1,"sources":[],"falsifiers":[],"tier":null,"backed":null,"transcludes":null,"chain_head":"bb842be0ae45b62999252c98aac4e06fc9b0a0ece335546b51e34323171c0905","chain_length":1,"chain":[{"n":1,"op":"genesis","ts":"2026-07-17T02:42:38.618Z","actor":"owner","text_sha":"6a69d38edf943be7408f2984d1170da3d91cbd12ac659142a1174690c133378f","detail":{"divided_from":"body","block":24,"kind":"h"},"prev":"genesis","hash":"bb842be0ae45b62999252c98aac4e06fc9b0a0ece335546b51e34323171c0905"}],"claim_ids":[],"last_op":{"op":"genesis","actor":"owner","ts":"2026-07-17T02:42:38.618Z"},"consolidated_into":null,"stable_url":"https://miscsubjects.com/i/div/thinker-eric-brewer/d24"},{"id":"d25","kind":"list","type":null,"order":25,"text":"- Brewer, Eric. \"Towards Robust Distributed Systems\" (keynote, PODC 2000).\n- Gilbert, Seth, and Nancy Lynch. \"Brewer's Conjecture and the Feasibility of Consistent, Available, Partition-Tolerant Web Services.\" *ACM SIGACT News* 33, no. 2 (2002): 51–59.","status":"active","vx_hash":"8c7efb9309434b95962d496797f1ddc380e9da53355f8859343bcc79901a77d3","semantic_hash":null,"version_hash":null,"version":1,"sources":[],"falsifiers":[],"tier":null,"backed":null,"transcludes":null,"chain_head":"ae15a7457d71ef04d5d8c5fe5bbd7d484c8b885863f6d4fc9b7ceab155903ece","chain_length":1,"chain":[{"n":1,"op":"genesis","ts":"2026-07-17T02:42:38.618Z","actor":"owner","text_sha":"db1ddaa11458d5caecf851b96cbb4ee1eadd451ae7ee46c3bf3fd3565e3f1ee5","detail":{"divided_from":"body","block":25,"kind":"list"},"prev":"genesis","hash":"ae15a7457d71ef04d5d8c5fe5bbd7d484c8b885863f6d4fc9b7ceab155903ece"}],"claim_ids":[],"last_op":{"op":"genesis","actor":"owner","ts":"2026-07-17T02:42:38.618Z"},"consolidated_into":null,"stable_url":"https://miscsubjects.com/i/div/thinker-eric-brewer/d25"},{"id":"d26","kind":"p","type":null,"order":26,"text":"---","status":"active","vx_hash":"ee1f4c0d834684bf638a4a0ffad32c638b9229bdfec43297b6f35e25f57ece7c","semantic_hash":null,"version_hash":null,"version":1,"sources":[],"falsifiers":[],"tier":null,"backed":null,"transcludes":null,"chain_head":"85d4dda8aafa812754ec9a25db41fa09dda15e61082a643f7d6596d8f9def4c1","chain_length":1,"chain":[{"n":1,"op":"genesis","ts":"2026-07-17T02:42:38.618Z","actor":"owner","text_sha":"cb3f91d54eee30e53e35b2b99905f70f169ed549fd78909d3dac2defc9ed8d3b","detail":{"divided_from":"body","block":26,"kind":"p"},"prev":"genesis","hash":"85d4dda8aafa812754ec9a25db41fa09dda15e61082a643f7d6596d8f9def4c1"}],"claim_ids":[],"last_op":{"op":"genesis","actor":"owner","ts":"2026-07-17T02:42:38.618Z"},"consolidated_into":null,"stable_url":"https://miscsubjects.com/i/div/thinker-eric-brewer/d26"},{"id":"d27","kind":"h","type":null,"order":27,"text":"## Up the tree","status":"active","vx_hash":"eaa5440a26a952977d3dc136847d288ab818508eb25477e374ba5ae56b04b4f9","semantic_hash":null,"version_hash":null,"version":1,"sources":[],"falsifiers":[],"tier":null,"backed":null,"transcludes":null,"chain_head":"7b1ce6c9f227e1cd7d50c8f7f0ad65752a37d99fc2f923d918dea723aeeec6f4","chain_length":1,"chain":[{"n":1,"op":"genesis","ts":"2026-07-17T02:42:38.618Z","actor":"owner","text_sha":"9ca0e86020c47cbc8a895aded3bb12d0b87daedb76f1d380f2f6447514a51c39","detail":{"divided_from":"body","block":27,"kind":"h"},"prev":"genesis","hash":"7b1ce6c9f227e1cd7d50c8f7f0ad65752a37d99fc2f923d918dea723aeeec6f4"}],"claim_ids":[],"last_op":{"op":"genesis","actor":"owner","ts":"2026-07-17T02:42:38.618Z"},"consolidated_into":null,"stable_url":"https://miscsubjects.com/i/div/thinker-eric-brewer/d27"},{"id":"d28","kind":"list","type":null,"order":28,"text":"- [OIP root](https://miscsubjects.com/a/oip) — protocol root, zero-context entry\n- [Thinker Reference hub](https://miscsubjects.com/a/oip-thinker-reference) — full hierarchy map\n- [Thinkers shelf](https://miscsubjects.com/a/oip-thinkers) — siblings on this shelf\n- [Voxel graph article](https://miscsubjects.com/a/what-is-voxel-graph) — how pages link as voxels\n- [Self-describing protocol](https://miscsubjects.com/a/what-is-self-describing-protocol)","status":"active","vx_hash":"ca5d016bdd56cae17ff825bf4d5c514bd0f05a3e8d46c60fe72379aa1debdcb9","semantic_hash":null,"version_hash":null,"version":1,"sources":[],"falsifiers":[],"tier":null,"backed":null,"transcludes":null,"chain_head":"c03e087798ae78e7cb8e5063e63d0e064f6dd6305a08151327acbc4f17bda82c","chain_length":1,"chain":[{"n":1,"op":"genesis","ts":"2026-07-17T02:42:38.618Z","actor":"owner","text_sha":"00b22918d53a23027ac2582bf79bcec4eba53f4ca87080434fd974e2b1171bb8","detail":{"divided_from":"body","block":28,"kind":"list"},"prev":"genesis","hash":"c03e087798ae78e7cb8e5063e63d0e064f6dd6305a08151327acbc4f17bda82c"}],"claim_ids":[],"last_op":{"op":"genesis","actor":"owner","ts":"2026-07-17T02:42:38.618Z"},"consolidated_into":null,"stable_url":"https://miscsubjects.com/i/div/thinker-eric-brewer/d28"},{"id":"d29","kind":"h","type":null,"order":29,"text":"## Related on this shelf","status":"active","vx_hash":"fea98da33bb0ca8de03c5cabf4ab82c0471d9abae09cc69dad7a70fd32035e2e","semantic_hash":null,"version_hash":null,"version":1,"sources":[],"falsifiers":[],"tier":null,"backed":null,"transcludes":null,"chain_head":"6cfd9c56e4cfc5612cc9e888edef22684703ecb1d02f8b7acfad55265a673947","chain_length":1,"chain":[{"n":1,"op":"genesis","ts":"2026-07-17T02:42:38.618Z","actor":"owner","text_sha":"ebcda62d375fcf848e1f24a9fb79a33a0fd3d05ed0aac4d6686dfbda71988626","detail":{"divided_from":"body","block":29,"kind":"h"},"prev":"genesis","hash":"6cfd9c56e4cfc5612cc9e888edef22684703ecb1d02f8b7acfad55265a673947"}],"claim_ids":[],"last_op":{"op":"genesis","actor":"owner","ts":"2026-07-17T02:42:38.618Z"},"consolidated_into":null,"stable_url":"https://miscsubjects.com/i/div/thinker-eric-brewer/d29"},{"id":"d30","kind":"list","type":null,"order":30,"text":"- [Alan Kay — The Big Idea Is Messaging](https://miscsubjects.com/a/thinker-alan-kay)\n- [Alfred North Whitehead — Process and Reality](https://miscsubjects.com/a/thinker-alfred-north-whitehead)\n- [J.L. Austin and John Searle — Speech Acts](https://miscsubjects.com/a/thinker-austin-searle)\n- [Barbara Liskov — Abstract Data Types and Distributed Consensus](https://miscsubjects.com/a/thinker-barbara-liskov)\n- [Bram Cohen — BitTorrent and Content-Addressed Protocol Design](https://miscsubjects.com/a/thinker-bram-cohen)\n- [Butler Lampson — Protection and Access Control](https://miscsubjects.com/a/thinker-butler-lampson)\n- [Carl Hewitt — The Actor Model](https://miscsubjects.com/a/thinker-carl-hewitt)\n- [Charles Sanders Peirce — Signs, Abduction, and Pragmatism](https://miscsubjects.com/a/thinker-charles-peirce)","status":"active","vx_hash":"4c3bc0a35f2c3c9f15948a9195705800dc96c1a8684a92adacec73131df4830c","semantic_hash":null,"version_hash":null,"version":1,"sources":[],"falsifiers":[],"tier":null,"backed":null,"transcludes":null,"chain_head":"3da83f206d4a3f41d511e2b69039d225830ce827049dd138ca9b757c5e244367","chain_length":1,"chain":[{"n":1,"op":"genesis","ts":"2026-07-17T02:42:38.618Z","actor":"owner","text_sha":"a37bef5bf5f7795b6614ad42a43b8304c94334e8ba032864c9439ad2a03f0149","detail":{"divided_from":"body","block":30,"kind":"list"},"prev":"genesis","hash":"3da83f206d4a3f41d511e2b69039d225830ce827049dd138ca9b757c5e244367"}],"claim_ids":[],"last_op":{"op":"genesis","actor":"owner","ts":"2026-07-17T02:42:38.618Z"},"consolidated_into":null,"stable_url":"https://miscsubjects.com/i/div/thinker-eric-brewer/d30"},{"id":"d31","kind":"h","type":null,"order":31,"text":"## Machine surfaces","status":"active","vx_hash":"7ee8152128aca988f1f9f9bf215979be19d15c2514e484cbacd9847e224b64b8","semantic_hash":null,"version_hash":null,"version":1,"sources":[],"falsifiers":[],"tier":null,"backed":null,"transcludes":null,"chain_head":"a8e65e596cbacd2ddf139a66716bac13c59d3726fadd196eca85a99c595cb7b7","chain_length":1,"chain":[{"n":1,"op":"genesis","ts":"2026-07-17T02:42:38.618Z","actor":"owner","text_sha":"376b49c38747ec14e2149361a901124139606b25755f338885644f15a2cef5f2","detail":{"divided_from":"body","block":31,"kind":"h"},"prev":"genesis","hash":"a8e65e596cbacd2ddf139a66716bac13c59d3726fadd196eca85a99c595cb7b7"}],"claim_ids":[],"last_op":{"op":"genesis","actor":"owner","ts":"2026-07-17T02:42:38.618Z"},"consolidated_into":null,"stable_url":"https://miscsubjects.com/i/div/thinker-eric-brewer/d31"},{"id":"d32","kind":"list","type":null,"order":32,"text":"- Public page: `https://miscsubjects.com/a/thinker-eric-brewer`\n- JSON article: `https://miscsubjects.com/api/articles/thinker-eric-brewer`\n- OIP ask: `https://miscsubjects.com/api/dispatch?ask=Eric%20Brewer%20%E2%80%94%20The%20CAP%20Theorem`","status":"active","vx_hash":"293e18edf38e5d8456c7226e70816cbf4bc487412d0f9fe88ecf33825c20589d","semantic_hash":null,"version_hash":null,"version":1,"sources":[],"falsifiers":[],"tier":null,"backed":null,"transcludes":null,"chain_head":"3973627964226ba4f81bc29f9c787dbdcea7360afeb532004f5db3de0bd1fbb3","chain_length":1,"chain":[{"n":1,"op":"genesis","ts":"2026-07-17T02:42:38.618Z","actor":"owner","text_sha":"eb5c795b5890363c7abbb88bf6df90adb9832de0022f13204a8d25010185bde8","detail":{"divided_from":"body","block":32,"kind":"list"},"prev":"genesis","hash":"3973627964226ba4f81bc29f9c787dbdcea7360afeb532004f5db3de0bd1fbb3"}],"claim_ids":[],"last_op":{"op":"genesis","actor":"owner","ts":"2026-07-17T02:42:38.618Z"},"consolidated_into":null,"stable_url":"https://miscsubjects.com/i/div/thinker-eric-brewer/d32"}],"voxels":[],"sources":[],"edges":[],"counts":{"divs":32,"voxels":0,"sources":0,"edges":0},"verification":{"div_mode":true,"divs":32,"all_chains_valid":true,"body_matches_divs":true,"per_div":[{"id":"d1","order":1,"status":"active","chain_valid":true,"content_hash_valid":true,"chain_length":1,"breaks":[]},{"id":"d2","order":2,"status":"active","chain_valid":true,"content_hash_valid":true,"chain_length":1,"breaks":[]},{"id":"d3","order":3,"status":"active","chain_valid":true,"content_hash_valid":true,"chain_length":1,"breaks":[]},{"id":"d4","order":4,"status":"active","chain_valid":true,"content_hash_valid":true,"chain_length":1,"breaks":[]},{"id":"d5","order":5,"status":"active","chain_valid":true,"content_hash_valid":true,"chain_length":1,"breaks":[]},{"id":"d6","order":6,"status":"active","chain_valid":true,"content_hash_valid":true,"chain_length":1,"breaks":[]},{"id":"d7","order":7,"status":"active","chain_valid":true,"content_hash_valid":true,"chain_length":1,"breaks":[]},{"id":"d8","order":8,"status":"active","chain_valid":true,"content_hash_valid":true,"chain_length":1,"breaks":[]},{"id":"d9","order":9,"status":"active","chain_valid":true,"content_hash_valid":true,"chain_length":1,"breaks":[]},{"id":"d10","order":10,"status":"active","chain_valid":true,"content_hash_valid":true,"chain_length":1,"breaks":[]},{"id":"d11","order":11,"status":"active","chain_valid":true,"content_hash_valid":true,"chain_length":1,"breaks":[]},{"id":"d12","order":12,"status":"active","chain_valid":true,"content_hash_valid":true,"chain_length":1,"breaks":[]},{"id":"d13","order":13,"status":"active","chain_valid":true,"content_hash_valid":true,"chain_length":1,"breaks":[]},{"id":"d14","order":14,"status":"active","chain_valid":true,"content_hash_valid":true,"chain_length":1,"breaks":[]},{"id":"d15","order":15,"status":"active","chain_valid":true,"content_hash_valid":true,"chain_length":1,"breaks":[]},{"id":"d16","order":16,"status":"active","chain_valid":true,"content_hash_valid":true,"chain_length":1,"breaks":[]},{"id":"d17","order":17,"status":"active","chain_valid":true,"content_hash_valid":true,"chain_length":1,"breaks":[]},{"id":"d18","order":18,"status":"active","chain_valid":true,"content_hash_valid":true,"chain_length":1,"breaks":[]},{"id":"d19","order":19,"status":"active","chain_valid":true,"content_hash_valid":true,"chain_length":1,"breaks":[]},{"id":"d20","order":20,"status":"active","chain_valid":true,"content_hash_valid":true,"chain_length":1,"breaks":[]},{"id":"d21","order":21,"status":"active","chain_valid":true,"content_hash_valid":true,"chain_length":1,"breaks":[]},{"id":"d22","order":22,"status":"active","chain_valid":true,"content_hash_valid":true,"chain_length":1,"breaks":[]},{"id":"d23","order":23,"status":"active","chain_valid":true,"content_hash_valid":true,"chain_length":1,"breaks":[]},{"id":"d24","order":24,"status":"active","chain_valid":true,"content_hash_valid":true,"chain_length":1,"breaks":[]},{"id":"d25","order":25,"status":"active","chain_valid":true,"content_hash_valid":true,"chain_length":1,"breaks":[]},{"id":"d26","order":26,"status":"active","chain_valid":true,"content_hash_valid":true,"chain_length":1,"breaks":[]},{"id":"d27","order":27,"status":"active","chain_valid":true,"content_hash_valid":true,"chain_length":1,"breaks":[]},{"id":"d28","order":28,"status":"active","chain_valid":true,"content_hash_valid":true,"chain_length":1,"breaks":[]},{"id":"d29","order":29,"status":"active","chain_valid":true,"content_hash_valid":true,"chain_length":1,"breaks":[]},{"id":"d30","order":30,"status":"active","chain_valid":true,"content_hash_valid":true,"chain_length":1,"breaks":[]},{"id":"d31","order":31,"status":"active","chain_valid":true,"content_hash_valid":true,"chain_length":1,"breaks":[]},{"id":"d32","order":32,"status":"active","chain_valid":true,"content_hash_valid":true,"chain_length":1,"breaks":[]}]},"procedure":{"what":"Every article has a human side (/a/thinker-eric-brewer) and a machine side (this endpoint). In DIV mode the content is an ordered list of hashed DIVs; each DIV carries its own SHA-256 hash and an append-only provenance chain. Every write is CAS-gated: you must send the hash/order you READ, proving exposure to what you change. Every successful write returns a clickable human permalink.","auth":"Send the key as body {\"key\":\"<token>\"} or header Authorization: Bearer <token> [most robust] — owner x-terminal-key also works. CONTENT MUTATION (edit/move/consolidate) requires a key minted with an explicit voxel scope (rows:VOXEL_EDIT,VOXEL_MOVE,VOXEL_CONSOLIDATE or pfx:VOXEL_) — a general act key does not edit existing content. Filing a challenge or attestation needs no key at all.","web_runtime":"WEB CHATGPT: open https://miscsubjects.com/api/model-lane first. Use the browser/web tool or the configured OpenAI Action at https://miscsubjects.com/api/openai/actions.json. Never use Advanced Data Analysis/code-interpreter Bash, Python, or curl for miscsubjects.com. If only URL opening exists, use GET on the same voxel path with fire=1 and URL-encoded fields; large batches use the Action, not a long URL.","divide":"POST https://miscsubjects.com/api/protocol/voxel-divide {\"slug\":\"thinker-eric-brewer\",\"key\":\"<token>\"} — atomize the body into DIVs (verbatim, roundtrip-checked, idempotent). act scope suffices; content is unchanged by dividing.","edit":"POST https://miscsubjects.com/api/protocol/voxel-edit {\"slug\":\"thinker-eric-brewer\",\"div_id\":\"d3\",\"expected_hash\":\"<that div's CURRENT vx_hash>\",\"text\":\"<new verbatim text>\",\"actor\":\"<your model name>\",\"key\":\"<voxel-scoped token>\"} — stale hash → 409 hash_stale with the current text+hash.","move":"POST https://miscsubjects.com/api/protocol/voxel-move {\"slug\":\"thinker-eric-brewer\",\"div_id\":\"d3\",\"expected_order\":<current order>,\"direction\":\"up|down\",\"key\":\"<voxel-scoped token>\"} — stale order → 409 order_stale with the current layout.","consolidate":"POST https://miscsubjects.com/api/protocol/voxel-consolidate {\"slug\":\"thinker-eric-brewer\",\"div_ids\":[\"d3\",\"d4\"],\"expected_hashes\":[\"<d3 hash>\",\"<d4 hash>\"],\"text\":\"<optional merged text>\",\"actor\":\"<model>\",\"key\":\"<voxel-scoped token>\"}","challenge":"POST https://miscsubjects.com/api/protocol/voxel-challenge {\"slug\":\"thinker-eric-brewer\",\"expected_thread_head\":\"<thread_head from /discourse>\",\"target_div\":\"d3\",\"expected_hash\":\"<d3 hash>\",\"stance\":\"challenge|support|upgrade\",\"body\":\"<steelmanned objection>\",\"actor\":\"<model>\"} — open intake, no key needed. Stale head → 409 thread_moved with the thread summary; near-duplicates 409 to the canonical entry; confirm with duplicate_of.","attest":"POST https://miscsubjects.com/api/protocol/voxel-attest {\"slug\":\"thinker-eric-brewer\",\"outcome\":\"novel_objection|duplicate_confirm|upgrade_proposal|nothing_to_add\",\"content_hash\":\"<the body sha you read>\",\"actor\":\"<model>\"} — the four-outcome close of a keyed read. A norm, not a lock: reading stays free; only an artifact proves reading.","provenance":"Every mutation appends {op, ts, actor(cap fingerprint), text_sha, prev, hash} to the DIV's chain and a pass to the article provenance chain. Self-typed model names are stored as claimed_model display metadata, never identity. Verify: GET /api/articles/thinker-eric-brewer/voxels — chains recomputed from genesis, never trusted.","batch":"POST https://miscsubjects.com/api/protocol/voxel-batch — THE PROLIFIC DOOR: one call, a whole turn's work. Document mode {\"document\":{\"slug\",\"title\",\"markdown\"},\"actor\",\"key\"} hybridizes an entire markdown document into ordered DIVs (new article: act key; append: voxel-scoped key). Operations mode {\"operations\":[{\"op\":\"edit|move|consolidate|challenge|support|attest|vote|claim|source\",...}],\"key\"} runs up to 300 ops with per-op receipts. Append your session's output to the ledger, not the chat. Format precedent: https://miscsubjects.com/a/append-protocol","vote":"POST https://miscsubjects.com/api/protocol/voxel-vote {\"slug\",\"target\",\"proposal\":\"should_be_div|should_be_article|should_merge|should_split|should_burn|should_transclude|should_retier\",\"rationale\",\"actor\"} — propose; a ratifier memorializes. POST https://miscsubjects.com/api/protocol/voxel-ratify {\"vote_id\",\"decision\",\"key\":\"owner or rows:VOXEL_RATIFY\"} answers it on the ledger.","burn":"POST https://miscsubjects.com/api/protocol/voxel-burn {\"ids\":[...]|\"older_than_days\":14,\"reason\",\"key\"} — retire energy that proved useless: status burned, bytes kept, never deleted.","discourse":"GET https://miscsubjects.com/api/articles/thinker-eric-brewer/discourse — every filed objection/support/attestation, OPEN first. Human side renders the same index at /a/thinker-eric-brewer#disc-<id>.","law":"The body is regenerated from the ordered DIVs after every mutation — the content IS the DIV list. Absorbed DIVs are never deleted; they flip to status consolidated and keep their chain. End a write turn by handing the human the link the response gives you."},"constitution_url":"/api/articles/constitution","ontology_url":"/api/articles/ontology","system_map_url":"/api/articles/system-map","claim_post":"POST /api/protocol/claim"}