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

Question 217

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 an immediate (one-step) consequence in F of the given premises?


A) (Ia • Ja • Ib • Jb • Ic • Jc) ⊃ (a=b \lor b=c \lor a=c) ]
B) (∀y) (∀z) [(Ia • Ja • Ia • Ja • Ia • Ja) ⊃ (a=y \lor y=z \lor a=z) ]
C) a≠b • Ib • Ja
D) (∀y) (∀z) [(Ia • Ja • Iy • Jy • Iz • Jz) ⊃ (x=y \lor y=z \lor x=z) ]
E) (∀y) (∀z) [(Ia • Ja • Iy • Jy • Iz • Jz) ⊃ (a=y \lor y=z \lor a=z) ]

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