x(A(x, y) ∧ B(x)) ∃x∃y(A(x, y) → B(x)) ¬∃x∃y(A(x, y) → B(x))

Transcription

x(A(x, y) ∧ B(x)) ∃x∃y(A(x, y) → B(x)) ¬∃x∃y(A(x, y) → B(x))