λ x0 x1 . ∃ x2 . and (and (∀ x4 . x4 ∈ x0 ⟶ ∃ x5 . and (x5 ∈ x1) (KPair_alt7 x4 x5 ∈ x2)) (∀ x4 . x4 ∈ x1 ⟶ ∃ x5 . and (x5 ∈ x0) (KPair_alt7 x5 x4 ∈ x2))) (∀ x4 x5 x6 x7 . KPair_alt7 x4 x5 ∈ x2 ⟶ KPair_alt7 x6 x7 ∈ x2 ⟶ iff (x4 = x6) (x5 = x7)) |
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