Definition of "nonlogical" [nonlogical]

• Not logical; not pertaining to logic. (adjective)

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• "Symbols in the signature are often called nonlogical constants, and an older name for them is primitives."
• "Pareto's 1901 essay "The Rise and Fall of Elites," conveys two themes to which Schumpeter would return time and time again: the inevitability of elites, and the importance of nonrational and nonlogical drives in explaining social action."
• "Instead of looking for the interpretations of the nonlogical constants that will make a sentence true, we fix the interpretations of the nonlogical constants by choosing a particular structure A, and we look for assignments of elements of A to variables which will make a given formula true in A."