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implies

<logic> (=> or a thin right arrow) A binary Boolean function and logical connective. A => B is true unless A is true and B is false. The truth table is

		A B | A => B
		----+-------
		F F |   T
		F T |   T
		T F |   F
		T T |   T


It is surprising at first that A => B is always true if A is false, but if X => Y then we would expect that (X & Z) => Y for any Z.

(1995-09-30)


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