Let x0 of type ι be given.
Let x1 of type ι be given.
Let x2 of type ι be given.
Assume H2: x2 = 0.
Apply unknownprop_0f872579da7879e9b32e4dbae6096b7cb722a0eb30e05326e317c49ae84fb9cd with
x0,
x1,
x2,
λ x3 x4 : ο . x4 leaving 3 subgoals.
The subproof is completed by applying H0.
The subproof is completed by applying H1.
The subproof is completed by applying H2.