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Proofgold Proof

pf
Let x0 of type ι be given.
Let x1 of type ι be given.
Let x2 of type ι be given.
Let x3 of type ι be given.
Let x4 of type ιο be given.
Assume H0: x4 x0.
Assume H1: x4 x1.
Assume H2: x4 x2.
Assume H3: x4 x3.
Let x5 of type ι be given.
Assume H4: x5SetAdjoin (SetAdjoin (UPair x0 x1) x2) x3.
Apply unknownprop_3de4fed6100f7a1644d3bcc671dd5818f525687e19a89aa1d64708dea3801718 with x0, x1, x2, x3, x5, x4 leaving 5 subgoals.
The subproof is completed by applying H4.
The subproof is completed by applying H0.
The subproof is completed by applying H1.
The subproof is completed by applying H2.
The subproof is completed by applying H3.