Multiple Choice
(∀x) [Px ⊃ (∃y) Qxy] ⊃ [(∃x) Px ⊃ (∃x) (∃y) Qxy]
-Which of the following propositions is also derivable in F?
A) (∀x) [~(∃y) Qxy ⊃ ~Px] ⊃ [(∀x) Px ~(∃x) (∃y) Qxy]
B) (∀x) [Px ⊃ (∃y) Qxy] ⊃ [(∀x) ∼Px (∃x) (∃y) Qxy]
C) (∀x) [~(∃y) Qxy ⊃ ~Px] ⊃ [~(∀x) Px ~(∃x) (∃y) Qxy]
D) (∀x) [~(∃y) Qxy ⊃ ~Px] ⊃ ~[(∀x) Px ~(∃x) (∃y) Qxy]
E) (∀x) [Px ⊃ (∃y) Qxy] ⊃ [(∀x) ∼Px (∃x) (∃y) ~Qxy]
Correct Answer:

Verified
Correct Answer:
Verified
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