proposition: Corollary not_all_ex_not_realizer2 : forall T S (F : T -> S -> formula), forall e, not_all_ex_not↓e ⊩ ¬(∀x y, F x y) → ∃x y, ¬F x y.
proof: Proof. do 3 Ksolve. eok. Qed.
imports: ClassicalRealizability.Tactics ClassicalRealizability.BasicResults ClassicalRealizability.Subtyping