Proofgold Proof

pf
Let x0 of type ο be given. Let x1 of type ο be given. The subproof is completed by applying unknownprop_535a42de1055bca61f176bc11115db76b3356ad18505799408acb5bdbd2addc1 with λ x2 x3 : ο → ο → ο . x2 x0 x1. ■