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Given a number of possible results, 2 in this case, one and only one of the results is possible, available.

Contrast to the Inclusive Or where out of the number of possible result any or all of the results are possible, available.

She believed in nothing; only her skepticism kept her from being an atheist. -- Jean-Paul Sartre

by ATinNM on Tue Jun 8th, 2010 at 10:04:03 AM EST
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