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Proofgold Proof

pf
Let x0 of type ο be given.
Assume H0: not x0x0.
Apply unknownprop_b257b354d80b58d9a8444b167a21f47b4aabc910dc3698404491d5ef01e18cf3 with x0, x0 leaving 2 subgoals.
Assume H1: x0.
The subproof is completed by applying H1.
The subproof is completed by applying H0.