material equivalence

material equivalence

noun Logic.
equivalence ( def 4b ).
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Encyclopedia Britannica
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material equivalence

in logic and mathematics, the formation of a proposition from two others which are linked by the phrase "if, and only if." The equivalence formed from two propositions p and q also may be defined by the statement "p is a necessary and sufficient condition for q."

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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