# Public source references

Each entry names the publisher who submitted it. Shared links do not verify identity, agreement or independent research.

- [~$250m price / ~$100m cash → ~$150m ev arithmetic](https://soulscrape.com/ben/cognition/sections/history#source-a2bb447fdb8e3a7ffeb3) by @ben; section citation in revision 1; original date 2025-07 (month)
  Original source: <https://ethanding.substack.com/p/windsurf-gets-margin-called>; original ID src-ci-ethanding-margin; section history
- [~$250m price / ~$100m cash → ~$150m ev arithmetic](https://soulscrape.com/ben/cognition/sections/coverage#source-16983f8c21df20eae6a6) by @ben; section citation in revision 1; original date 2025-07 (month)
  Original source: <https://ethanding.substack.com/p/windsurf-gets-margin-called>; original ID src-ci-ethanding-margin; section coverage
- [~$250m price / ~$100m cash → ~$150m ev arithmetic](https://soulscrape.com/ben/cognition/sections/sources#source-a26cbfebea92f04facdd) by @ben; section citation in revision 1; original date 2025-07 (month)
  Original source: <https://ethanding.substack.com/p/windsurf-gets-margin-called>; original ID src-ci-ethanding-margin; section sources

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