Let x0 of type ι be given.
Assume H0:
∀ x1 . nIn x1 x0.
Apply unknownprop_ea78574cb3264467ecb0cee6dab0f2cbbdf0e0a00f843238d57e1be6acdbe25f with
x0.
Let x1 of type ι be given.
Apply FalseE with
prim1 x1 4a7ef...
Apply H0 with
x1.
The subproof is completed by applying H1.