An argument that Lean is the best programming language because it is 'perfectable' — you can write and prove properties about code within the language itself. The post covers dependent types as the natural endpoint of type system evolution, Lean's seamless metaprogramming with custom syntax (demonstrated via a tic-tac-toe board DSL), performance potential enabled by provable code equivalence, and Lean's growing community compared to Coq, Idris, and Agda. The author contends that theorem proving emerges naturally from pushing programming languages to their logical conclusion.
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