Let x0 of type ι be given.
Let x1 of type ι → ι be given.
Let x2 of type ι → ι be given.
Assume H0:
∀ x3 . In x3 x0 ⟶ Subq (x1 x3) (x2 x3).
Apply unknownprop_c64060985712f5c39c225eb3dab14c939b65a26a5915e1c104b0e622ec2f8a29 with
x0,
x0,
x1,
x2 leaving 2 subgoals.
The subproof is completed by applying unknownprop_d889823a5c975ad2d68f484964233a1e69e7d67f0888aa5b83d962eeca107acd with x0.
The subproof is completed by applying H0.