Let x0 of type ι be given.
Let x1 of type ι be given.
Let x2 of type ι be given.
Let x3 of type ι be given.
Apply unknownprop_b46721c187c37140cbae22d356b00ba89f4126d81d8665e4be15b5a58c78d06f with
x0,
x1,
x3,
prim1 x3 x2 leaving 3 subgoals.
The subproof is completed by applying H2.
Apply H0 with
x3.
The subproof is completed by applying H3.
Apply H1 with
x3.
The subproof is completed by applying H3.