Consider the proposition It is not the case that if x > 5 or y>5 then xy > 25. Translate the proposition from informal notation to formal notation. Make it clear what each propositional letter stands for.
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A proposition (or statement) is a sentence that is either TRUE or FALSE (but not both). 1.1.2 Examples. All the following sentences are propositions. (1) Pretoria is the capital of South Africa. (2) 3 + 3 = 5. (3) If x is a real number, then x2 < 0. (FALSE) (4) All kings of the United States are bald. (TRUE)
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