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formal logic

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noun
  1. the branch of logic concerned exclusively with the principles of deductive reasoning and with the form rather than the content of propositions.
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Origin of formal logic

First recorded in 1855–60
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for formal logic

formal logic

noun
  1. Also called: symbolic logic the study of systems of deductive argument in which symbols are used to represent precisely defined categories of expressionsCompare philosophical logic
  2. a specific formal system that can be interpreted as representing a fragment of natural argument
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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