Hacker News Reader

They definitely don’t all compile to the same thing. Some do, most don’t.

I meant to say they are all the same thing on logical level, all those fancy typed theories can be reduced to hol/fol, for some it is implemented, for others not.

That’s not true either. Coq’s logic is significantly different to HoL.

hol meaning higher order logic (https://en.wikipedia.org/wiki/Higher-order_logic) not the lang of hol prover.

Reply on news.ycombinator.com