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(i) Use a tree to test whether the following wff is a tautology. If it is not, then read off from your tree a model

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(i) Use a tree to test whether the following wff is a tautology. If it is not, then read off from your tree a model on which it is false. Ex(Gax H (Gax 1 Gxb)) (i) Use a tree to test whether the following wff is a tautology. If it is not, then read off from your tree a model on which it is false. Ex(Gax H (Gax 1 Gxb))

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