Question: 2. Use the tree method to determine whether the following argument is valid or invalid. Clearly indicate what property of the tree justifies your answer:

2. Use the tree method to determine whether the following argument

2. Use the tree method to determine whether the following argument is valid or invalid. Clearly indicate what property of the tree justifies your answer: (2 pts.) (P+Q) ~(Q+P), ~(~P&Q) F (P&-Q)

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