logic.

1. The study or use of rules for drawing conclusions that follow from stated premises.

2. The pattern of reasons or operating principles that explains how something works.

Use it for

Words that belong together

• formal logic
• deductive logic

On the page

Formal logic distinguishes a valid inference from a true premise.

Usage notes

Primary category: analysis / argumentation / evidence. Forms: Usually uncountable; no ordinary plural in this sense. Legacy lexical fields mirror sense 1 only. Use numbered sense fields for all meanings. Established modern English lexical item. No separate regional spelling or grammatical inflection entry. Commonness: moderately common.