raison detre
See Also
Definition
raison d'être -- ""reason or justification for being or existence"" -- raison d'être. Dictionary.com. Dictionary.com Unabridged (v 1.0.1), Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006. http://dictionary.reference.com/browse/raison d'être (accessed: November 06, 2006).
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