如何在 Coq 中证明 (0 = 2) -> false？

Question

In a proof of one lemma I eventually reached a state, where

I have a premise

H: 0 = 2

and I have to prove

false .

Question : how to infer that the premise H is false to conclude the proof?

Answer 1

The discriminate tactic can deal with situations like that. I believe that easy also works, as does congruence , which are a bit more general than discriminate .

Answer 2

If you want to understand how it works "behind the scenes", this answer may be useful.