Let x0 of type ι be given.
Let x1 of type ι be given.
Apply unknownprop_5a5c48612170d465714265799d25003db15da4f2d5d05eaf9fa403276d7d9f0a with
e4431.. x1,
x0,
e4431.. x0 leaving 3 subgoals.
Apply unknownprop_afbf697e4489c80654ae2bc4c6605f6f1d2a8b7dcfe3f07863a96592ab5c88f5 with
x1.
The subproof is completed by applying H1.
The subproof is completed by applying H2.
Apply unknownprop_90012ae02c7e97888ea4d0a930b01b500b9d0d1d1a0841df69b82a77726b906b with
x0.
The subproof is completed by applying H0.