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Select the Best Translation into Predicate Logic, Using the Following \lor

Question 227

Multiple Choice

select the best translation into predicate logic, using the following translation key:
b: Bhavin
c: Chloe
m: Megha
n: Nietzsche
p: Plato
Ax: x is an altruist
Jx: x is joyful
Px: x is a philosopher
Rx: x is Russian
Tx: x is thoughtful
Bxy: x is a brother of y
Mxy: x mocks y
Rxy: x is richer than y
Sxy: x is smarter than y
-Exactly three philosophers mock Plato and Nietzsche.


A) (∃x) (∃y) (∃z) {Px • Mxp • Mxn • Py • Myp • Myn • Pz • Mzp • Mzn • x≠y • x≠z • y≠z •
(∀w) [(Pw • Mwp • Mwn) ⊃ (w≠x \lor w≠y \lor w≠z) ]}
B) (∃x) (∃y) (∃z) {Px • Mxp • Mxn • Py • Myp • Myn • Pz • Mzp • Mzn • x=y • x=z • y=z •
(∀w) [(Pw • Mwp • Mwn) ⊃ (w=x \lor w=y \lor w=z) ]}
C) (∃x) (∃y) (∃z) {Px • Mxp • Mxn • Py • Myp • Myn • Pz • Mzp • Mzn • x=y • x=z • y=z •
(∃w) [(Pw • Mwp • Mwn) • (w=x \lor w=y \lor w=z) ]}
D) (∃x) (∃y) (∃z) {Px • Mxp • Mxn • Py • Myp • Myn • Pz • Mzp • Mzn • x≠y • x≠z • y≠z •
(∀w) [(Pw • Mwp • Mwn) ⊃ (w=x \lor w=y \lor w=z) ]}
E) (∃x) (∃y) (∃z) {Px • Mxp • Mxn • Py • Myp • Myn • Pz • Mzp • Mzn • x≠y • x≠z • y≠z •
(∃w) [(Pw • Mwp • Mwn) • (w≠x \lor w≠y \lor w≠z) ]}

Correct Answer:

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