Question: Whatever is true is not false and whatever is not false is true. If anything is false then no one knows it . John knows

Whatever is true is not false and whatever is not false is true. If anything is false then no one knows it. John knows something. So, something is true.
Provide a dictionary for this argument. and translate it into predicate logic.
Evaluate its validity using a TRUTH TREE.
If the argument is invalid, identify a counterexample evaluation

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