| Noun | 1. | logical system - a system of reasoning system of rules, system - a complex of methods or rules governing behavior; "they have to operate under a system they oppose"; "that language has a complex system for indicating gender" Aristotelian logic - the syllogistic logic of Aristotle as developed by Boethius in the Middle Ages formal logic, mathematical logic, symbolic logic - any logical system that abstracts the form of statements away from their content in order to establish abstract criteria of consistency and validity extrapolate - gain knowledge of (an area not known or experienced) by extrapolating induce - reason or establish by induction negate, contradict - prove negative; show to be false elicit - derive by reason; "elicit a solution" |