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Proofgold Proof

pf
Let x0 of type ο be given.
Let x1 of type ο be given.
Assume H0: not x0.
Assume H1: x1.
Apply unknownprop_b777a79c17f16cd28153af063df26a4626b11c1f1d4394d7f537c11837ab0962 with exactly1of2 x0 x1.
Assume H2: not (exactly1of2 x0 x1).
Apply unknownprop_3da24d51bcee755e70413ee89aaa40a0b231132f51a75cb86f122fc0fbfbaea8 with x0, x1 leaving 3 subgoals.
The subproof is completed by applying H2.
Assume H3: x0.
Assume H4: x1.
Apply notE with x0 leaving 2 subgoals.
The subproof is completed by applying H0.
The subproof is completed by applying H3.
Assume H3: not x0.
Assume H4: not x1.
Apply notE with x1 leaving 2 subgoals.
The subproof is completed by applying H4.
The subproof is completed by applying H1.
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