logic

(noun) the branch of philosophy that analyzes inference.

(noun) reasoned and reasonable judgment. Example: "It made a certain kind of logic."

(noun) the principles that guide reasoning within a given field or situation. Examples: "Economic logic requires it." "By the logic of war."

(noun) the system of operations performed by a computer that underlies the machine's representation of logical operations.

(noun) a system of reasoning. Synonyms: logical system, system of logic.