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The saddest words
the branch of logic that studies the syntactic properties of formal theories, esp the syntactic characterization of deductive validity
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Nearby words for proof theory
proof of the pudding, the