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Ivan Will Be Sad If and Only If Any Child

Question 26

Multiple Choice

Ivan will be sad if and only if any child is injured.

A) Si ≡ (∃x) (Cx • Ix)
B) (x) [(Cx • Ix) ≡ Ix]
C) (∃x) (Cx • Ix) ⊃ Si
D) Si ≡ (x) (Cx • Ix)
E) Si ≡ (x) (Cx ⊃ Ix)

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