## Definition of logic

**:**a science that deals with the principles and criteria of validity of inference and demonstration

**:**the science of the formal principles of reasoning

- a professor of logic

**:**a branch or variety of logic

- modal logic

- Boolean logic

**:**a branch of semiotics; especially

**:**syntactics

**:**the formal principles of a branch of knowledge

- the logic of grammar

**:**interrelation or sequence of facts or events when seen as inevitable or predictable

- By the logic of events, anarchy leads to dictatorship.

**:**the arrangement of circuit elements (as in a computer) needed for computation; also

**:**the circuits themselves

**:**something that forces a decision apart from or in opposition to reason

- the logic of war