> He clearly hasn't proven anything about his code.
Is that a bad thing? It seems like many people are able to write software that works well and gets the job done without "proving anything" about their code in the way you're describing. Personally, I'm fine with not proving anything if I can deliver quickly and everything works, but I'd like to be convinced otherwise if there's real value there.
For basic infrastructure such as compilers and standard libraries (at least of data structures and algorithms), not providing proofs of correctness is outright criminal.
Is that a bad thing? It seems like many people are able to write software that works well and gets the job done without "proving anything" about their code in the way you're describing. Personally, I'm fine with not proving anything if I can deliver quickly and everything works, but I'd like to be convinced otherwise if there's real value there.
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