the science that investigates the principles governing correct or reliable inference.

a particular method of reasoning or argumentation

We were unable to follow his logic.

the system or principles of reasoning applicable to any branch of knowledge or study.

reason or sound judgment, as in utterances or actions

There wasn't much logic in her move.

convincing forcefulness; inexorable truth or persuasiveness

the irresistible logic of the facts.

Computers . logic circuit.

noun

unreasonableness

noun

antithesis and synthesis , argumentation , coherence , connection , course of thought , deduction , dialectic , good sense , induction , inference , linkage , philosophy , ratiocination , rationale , relationship , sanity , sense , sound judgment , syllogism , syllogistics , thesis , train of thought , rationality , reason , rationalness , affirmation , analysis , argument , assertion , consistency , construct , dialectics , disjunction , lemma , predicate , premise , reasoning , syntactics , synthesis