Question: 8. Use a tree to test whether the following proposition is a tautology. (Present the tree, and say whether the proposition is a tautology or

8. Use a tree to test whether the following proposition is

8. Use a tree to test whether the following proposition is a tautology. (Present the tree, and say whether the proposition is a tautology or not.) If the proposition is not a tautology, read off from your tree an assignment of truth values to basic wffs on which the proposition is false (and indicate the path from which you are reading it off). (((AB)(CD))((AB)(CD)))

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