(3x € X: (Vy € Y : E(x, y))) = \x € X : (³y €Y : ¬E(x, y)) ¬(Vx € X : (³ € Y : E(x, y))) = (3x € X : (Vy € Y : ¬E(x, y))) (3x € X: E(x)) = (Vx X: E(x)) ≤
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