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1 (∀X)(∀y)(∀z)[(Ix • Jx • Iy • Jy • Iz \lor

Question 188

Multiple Choice

1. (∀x) (∀y) (∀z) [(Ix • Jx • Iy • Jy • Iz • Jz) ⊃ (x=y \lor y=z \lor x=z) ]
2. Ia • Ja • Ka • Ib • Jb • Kb • a≠b
-Which of the following propositions is derivable from the given premises in F?


A) (∀x) [(Ix • Jx) ≡ (a=x • b=x) ]
B) (∀x) [Kx ⊃ (Ix • Jx) ]
C) (∀x) [(x≠a • x≠b) ⊃ ~(Jx \lor Ix) ]
D) (∀x) [(Ix • Lx) ⊃ (x=a \lor x=b \lor ∼Jx) ]
E) (∀x) [(Kx • Lx) ⊃ Jx]

Correct Answer:

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