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 unknownprop_99075cb60dd6ee1ecde84daf9e64c3f2c524bf0d235a5b34e6bf4c80b29f7ce1 with
x0,
x1,
x2,
x3,
0,
λ x4 x5 . x5 = f4b0e.. x0 x1 x2 x3.
Apply Repl_Empty with
λ x4 . SetAdjoin x4 (Sing 5),
λ x4 x5 . binunion (f4b0e.. x0 x1 x2 x3) x5 = f4b0e.. x0 x1 x2 x3.
Apply binunion_idr with
f4b0e.. x0 x1 x2 x3,
λ x4 x5 . x5 = f4b0e.. x0 x1 x2 x3.
Let x4 of type ι → ι → ο be given.
The subproof is completed by applying H0.