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iff
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The answer IFF has 0 possible clue(s) in existing crosswords.
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The word IFF is VALID in some board games. Check IFF in word games in Scrabble, Words With Friends, see scores, anagrams etc.
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Definitions of iff in various dictionaries:
Identification, friend or foe.
conj - if and only if
IFF - In logic and related fields such as mathematics and philosophy, if and only if (shortened iff) is a biconditional logical connective between statemen...
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In logic and related fields such as mathematics and philosophy, if and only if (shortened iff) is a biconditional logical connective between statements. * In that it is biconditional (a statement of material equivalence), the connective can be likened to the standard material conditional ("only if", equal to "if ... then") combined with its reverse ("if"); hence the name. The result is that the truth of either one of the connected statements requires the truth of the other (i.e. either both statements are true, or both are false). It is controversial whether the connective thus defined is properly rendered by the English "if and only if", with its pre-existing meaning. There is nothing to stop one from stipulating that we may read this connective as "only if and if", although this may lead to confusion. * In writing, phrases commonly used, with debatable propriety, as alternatives to P "if and only if" Q include Q is necessary and sufficient for P, P is equivalent (or materially equivalent |