1. (∃x) (∃y) {Gx • Gy • x≠y • (∀z) [Gz ⊃ (z=x z=y) ]}
2. Ga • Gb • Gc
-Which of the following propositions is an immediate (one-step) consequence in F of the given premises?
A) Gb • Ga
B) (∃y) {Gd • Gy • d≠y • (∀z) [Gz ⊃ (z=d z=y) ]}
C) (∃y) {Gx • Gy • d≠y • (∀z) [Gz ⊃ (z=d z=y) ]}
D) (∃y) {Gd • Gy • x≠y • (∀z) [Gz ⊃ (z=d z=y) ]}
E) (∃y) {Gd • Gy • d≠y • (∀z) [Gd ⊃ (z=x z=y) ]}
Correct Answer:
Verified
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