Prove that the following arguments are invalid. Use method of interpretation (5) 1. (Ex)(Px. ~ Qx)...

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Prove that the following arguments are invalid. Use method of interpretation

(5) 1. (Ex)(Px. ~ Qx) 2. (X)(Rx Px) 1:. (3x)(Rx.~ Qx)

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Answer: 1) (3x) (Px.~@x) 9) (x) CRX > Px) 1: (3x) (RX-wax) {[(3x) (RNmax)] Fox an>Pn) }} ~[(31)(2x mars) : (44)PCR) witten a check 12c case: T-> exit arguments is invalid if T F not enit valid. R = false , Pi= true, QI : false R2 = false P2 = True

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Answer 2

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Prove that the following arguments are invalid. Use method of interpretation (5) 1. (Ex)(Px. ~ Qx)...