The negation of a statement
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This would be "negation."
yes, it is called the truth value
compound statement
To prove by contradiction, you assume that an opposite assumption is true, then disprove the opposite statement.
Making a truth table is actually very simple.For the statement P, it can either be true, or false.P--TFNOT P, or -p (or ~p) is the opposite. If P is true, then not P is... false!The same holds true for if P is false, what is not P? True!The truth table for ~p looks like thisP | ~p--------T | FF | T