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Derive the Conclusions of Each of the Following Arguments Using

Question 213

Essay

derive the conclusions of each of the following arguments using the rules of inference for F, including the rules for identity.
-1. (∀x)(Ecx ⊃ x=d)
2. (∀x){(Fx • Gx) ⊃ (∀y)[(Fy • Gy) ⊃ y=x]}
3. (∃x)(Fx • Gx • Ecx)
4. Fa • Ga / a=d

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