The logical and the extra-logical

Fred Sommers

pp. 235-252

in: Robert S. Cohen, Mark W. Wartofsky (eds), Methodological and historical essays in the natural and social sciences, Berlin, Springer, 1974

Abstract

1. Medieval logicians called words like "every", "not", "is' and" some" 'syncategorematic." Today, such words — along with propositional constants such as "and", "if…then" and "or" — are referred to as logical or formative signs in contrast to extra-logical or descriptive signs.