Search for blocks/addresses/...

Proofgold Proof

pf
Let x0 of type ο be given.
Let x1 of type ιιι be given.
Let x2 of type ιιι be given.
Assume H0: not x0.
Apply functional extensionality with If_iii x0 x1 x2, x2.
Let x3 of type ι be given.
Apply functional extensionality with If_iii x0 x1 x2 x3, x2 x3.
Let x4 of type ι be given.
Apply If_i_0 with x0, x1 x3 x4, x2 x3 x4.
The subproof is completed by applying H0.