Let x0 of type ι be given.

Let x1 of type ι be given.

Let x2 of type ι → ο be given.

Let x3 of type ι → ο be given.

Assume H0: 40dde.. x0 x2 x1 x3.

Apply orIL with 40dde.. x0 x2 x1 x3, and (x0 = x1) (PNoEq_ x0 x2 x3).

The subproof is completed by applying H0.

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Proofgold Proof