1 (∀X)[Ax ⊃ (∀Y)(By ⊃ Cxy)]
2 $\lor$ Ax)]
C) (∀X)[Ax ⊃ (∀Y)(By ⊃ Cyx)]
D) (∀X)[Ax ⊃

question 257

Multiple Choice

1. (∀x) [Ax ⊃ (∀y) (By ⊃ Cxy) ]
2. (∃x) [Ex • (∀y) (Hy ⊃ Cxy) ]
3. (∀x) (∀y) (∀z) [(Cxy • Cyz) ⊃ Cxz]
4. (∀x) (Ex ⊃ Bx)
-Which of the following propositions is derivable from the given premises in F?

• A) (∀x){Ex ⊃ [(∃y)Cxy ⊃ (∃y)Cyx]}
• B) (∀x)[Bx ⊃ (Ex \( \lor \) Ax)]
• C) (∀x)[Ax ⊃ (∀y)(By ⊃ Cyx)]
• D) (∀x)[Ax ⊃ (∀y)(Hy ⊃ Cxy)]
• E) (∀x){Ax ⊃ (∀y)[(Hy • By) ≡ Cxy]}

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