Proofgold Proof

pf
Let x0 of type ι be given. Let x1 of type ι be given. Let x2 of type ι → ι → ο be given. The subproof is completed by applying unknownprop_e85291fb35803c023ccd3334fe2aa44f358417ed58f2984158eb70ae34b3f0f3 with u5, x0, x1, λ x3 x4 . not (x2 x3 x4). ■