There is a massive possibility space between “yolo” and formal proof. Rust has substantial evidence of correctness. For example, unit tests and types.
That's verifying the implementation. The type system wasn't verified. It implements stuff perfectly, it has tests that prove it, but nobody formally verified that they perfectly implemented the correct algorithms
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That's verifying the implementation. The type system wasn't verified. It implements stuff perfectly, it has tests that prove it, but nobody formally verified that they perfectly implemented the correct algorithms