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Proofgold Proof

pf
Let x0 of type ι be given.
Let x1 of type ιι be given.
Let x2 of type ι be given.
Let x3 of type ι be given.
Assume H0: prim1 x2 x0.
Assume H1: prim1 x3 (x1 x2).
Apply UnionI with 94f9e.. x0 x1, x3, x1 x2 leaving 2 subgoals.
The subproof is completed by applying H1.
Apply unknownprop_4785a7374559bd7d78314ce01f76cab97234c9b29cfa5b01c939c64f8ccf18e4 with x0, x1, x2.
The subproof is completed by applying H0.