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Premises: P Q notQvvR Conclusion: notPvv ( Q ? ? R ) table [ [ P , Q , R , P - >

Premises:
PQ
notQvvR
Conclusion: notPvv(Q??R)
\table[[P,Q,R,P->Q,notQ,notQvvR,notP,Q^^R,\table[[notPvv],[(Q^^R)]]],[T,T,T,T,F,T,F,T,T],[T,T,F,T,F,F,F,F,F],[T,F,T,F,T,T,F,F,F],[T,F,F,F,T,T,F,F,F],[F,T,T,T,F,T,T,T,T],[F,T,F,T,F,F,T,F,T],[F,F,T,T,T,T,T,F,T],[F,F,F,T,T,T,T,F,T]]
The proposal is valid because the conclusion is true every time the premises are true.
This can be seen in rows 1,5,7, and 8.
Do you agree or disagree?
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