Question: Give proofs using the natural deduction system provided: E m,n (conditional elimination), &Em (conjunction elimination), &Im,n (conjunction introduction), vIm (disjunction introduction), vE m,n (disjunction elimination),
Give proofs using the natural deduction system provided:
Em,n (conditional elimination), &Em (conjunction elimination), &Im,n (conjunction introduction), vIm (disjunction introduction), vEm,n (disjunction elimination), Em,n (biconditional elimination), Im,n (biconditional introduction), Rm (reiteration), Im,n (conditional introduction), ~I (negative introduction), ~E (negative elimination)
Question 2.
(a) From PvQ, prove (~P->Q)vR.
(b) From P~Q and Q&R, prove that ~P.
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