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 → ι → ο be given.
The subproof is completed by applying unknownprop_ada8e0cd42ccf7b8e6a4db95c2882e1c3b90fe543207528aeed1611d7e5ee8f6 with
x1,
x2,
λ x4 . atleastp x0 x4 ⟶ not (∀ x5 . x5 ∈ x4 ⟶ ∀ x6 . x6 ∈ x4 ⟶ (x5 = x6 ⟶ ∀ x7 : ο . x7) ⟶ x3 x5 x6).