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 Russian philosophers are joyful.
A) (∃x) (∃y) (∃z) {Rx • Px • Jx • Ry • Py • Jy • Rz • Pz • Jz • x≠y • x≠z • y≠z •
(∀w) [(Rw • Pw • Jw) ⊃ (w=x w=y w=z) ]}
B) (∃x) (∃y) (∃z) {Rx • Px • Jx • Ry • Py • Jy • Rz • Pz • Jz • x≠y • x≠z • y≠z •
~(∃w) [Rw • Pw • Jw • (w=x w=y w=z) ]}
C) (∃x) (∃y) (∃z) {Rx • Px • Jx • Ry • Py • Jy • Rz • Pz • Jz • x≠y • x≠z • y≠z •
(∃w) [Rw • Pw • Jw • (w=x w=y w=z) ]}
D) (∃x) (∃y) (∃z) {Rx • Px • Jx • Ry • Py • Jy • Rz • Pz • Jz • x≠y • x≠z • y≠z •
(∀w) [(Rw • Pw • Jw) ⊃ (w=x • w=y • w=z) ]}
E) (∃x) (∃y) (∃z) {Rx • Px • Jx • Ry • Py • Jy • Rz • Pz • Jz • x≠y • x≠z • y≠z •
(∀w) [(Rw Pw Jw) ⊃ (w=x • w=y • w=z) ]}
Correct Answer:

Verified
Correct Answer:
Verified
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