On page 4 of the text, we stated as more or less “obvious” the fact that
p ↔ q is true if p and q have the same (*) truth values and false if p and q have different truth values.
Using the fact that p↔q means “p → q and q → p" together with how the truth values for x → y are determined, write a short note (in good English) explaining why (*) is the ease.
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