Let x0 of type ι be given.
Let x1 of type ι be given.
Apply unknownprop_05a8fb1492e1d649432d99059efe6cb5519f68cbf274db02d816fcaae9af18ba with
x0,
λ x2 x3 . x2 = x1.
Apply unknownprop_05a8fb1492e1d649432d99059efe6cb5519f68cbf274db02d816fcaae9af18ba with
x1,
λ x2 x3 . Unj (Inj0 x0) = x2.
Apply H0 with
λ x2 x3 . Unj x3 = Unj (Inj0 x1).
Let x2 of type ι → ι → ο be given.
The subproof is completed by applying H1.