Let x0 of type ι be given.
Let x1 of type ι be given.
Apply unknownprop_a23ec6a55ac212526d74cbf0d04096929ad453b0eb0f8023e32b8a33930d39fb with
UPair x0 x1,
UPair x1 x0 leaving 2 subgoals.
The subproof is completed by applying unknownprop_0e0fb00663b5b934a2edae74cd16d40824654a160462d0a383e91790719f8b25 with x0, x1.
The subproof is completed by applying unknownprop_0e0fb00663b5b934a2edae74cd16d40824654a160462d0a383e91790719f8b25 with x1, x0.