# When you keep AI Lean, you keep AI correct

> Source: <https://stackoverflow.blog/2026/08/28/when-you-keep-ai-lean-you-keep-ai-correct/>
> Published: 2026-08-28 04:22:24.336907+00:00

[Lean](https://lean-lang.org/) is a functional programming language and proof assistant that allows developers to write programs and verify their mathematical correctness within the exact same system.

Connect with Leo on [LinkedIn](https://www.linkedin.com/in/leonardo-de-moura-26a27b5/) and check out his many badges on [Stack Overflow](https://stackoverflow.com/users/841416/leonardo-de-moura).

Congrats to Populist badge winner [Peter Lawrey](https://stackoverflow.com/users/57695/peter-lawrey) for winning the badge on their answer to [Check two float/double values for exact equality](https://stackoverflow.com/questions/15572700/check-two-float-double-values-for-exact-equality).