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 andI with
x0 = x2,
x1 = x3 leaving 2 subgoals.
Apply unknownprop_4fc470822a158af7e86f7979d245a09f9664221329cda46c152b9c38fb3d34d0 with
x0,
x1,
x2,
x3.
The subproof is completed by applying H0.
Apply unknownprop_76c22f38ce8e1e6662ba6e808ea8b95144526b3bc9e5268d53e5b2efe525bc94 with
x0,
x1,
x2,
x3.
The subproof is completed by applying H0.