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Proofgold Proof

pf
Let x0 of type ο be given.
Let x1 of type (ιο) → ο be given.
Let x2 of type (ιο) → ο be given.
Assume H0: x0.
Apply functional extensionality with 06f01.. x0 x1 x2, x1.
Let x3 of type ιο be given.
Apply prop_ext_2 with 06f01.. x0 x1 x2 x3, x1 x3 leaving 2 subgoals.
Assume H1: and (x0x1 x3) (not x0x2 x3).
Apply unknownprop_c29e201c2636d12615b11e1220001fcc0c2bbdeb53735eb34683c60a05a28860 with x0x1 x3, not x0x2 x3 leaving 2 subgoals.
The subproof is completed by applying H1.
The subproof is completed by applying H0.
Assume H1: x1 x3.
Apply unknownprop_389e2fb1855352fcc964ea44fe6723d7a1c2d512f04685300e3e97621725b977 with x0x1 x3, not x0x2 x3 leaving 2 subgoals.
Assume H2: x0.
The subproof is completed by applying H1.
Assume H2: not x0.
Apply FalseE with x2 x3.
Apply notE with x0 leaving 2 subgoals.
The subproof is completed by applying H2.
The subproof is completed by applying H0.