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Prove using rules of inference: ?(?indy) ∀x(S(x) <-> Q(x)) ∀x(Q(x) ʌ R(x)) R(Cindy)

Prove using rules of inference:

?(?indy)

∀x(S(x) <-> Q(x))

∀x(Q(x) ʌ R(x))

R(Cindy)

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