Let x0 of type ι be given.
Let x1 of type ι be given.
Let x2 of type ι be given.
Apply unknownprop_85c22e88a806aabda7246f27ac458442bcb94ac25cc9a3616a68cf646d95941d with
x1,
x2.
Apply Subq_tra with
x2,
x0,
x1 leaving 2 subgoals.
Apply unknownprop_4134b8a5d866cd7ad711ea569ada0ca0ba949f5cad571bf5782dc7c2d15cdb1c with
x0,
x2.
The subproof is completed by applying H1.
The subproof is completed by applying H0.