Proofgold Proof

pf
Let x0 of type ο be given. Let x1 of type ο be given. Assume H0: x0 ⟶ x1. Assume H1: not x0 ⟶ False. Assume H2: x1 ⟶ False. Apply H2. Apply H0. Apply unknownprop_b777a79c17f16cd28153af063df26a4626b11c1f1d4394d7f537c11837ab0962 with x0. The subproof is completed by applying H1. ■