Comment by solomonb

i love lean4, best in class functional programming language. but i think its "perfectability" is kinda hamstrung by baking non-constructive axioms into the standard library. the kernel has to treat these as opaque constants that cannot be reduced.

i tend to stick with agda for doing mathy programming. i kinda want lean4 to replace haskell at some point in the future as the workhorse production typed fp language.