---
tag: FG43HJPAB5
kind: concept
name: False (logic)
aliases: [absurdity-logic, falla-yycy, logical-falsity]
sources:
  - wikipedia: en:229823@r1286738932
    locator: False (logic)
    note: adopted
    mention: wikipedia://en/229823
    sections: [Summary]
same_as:
  wikidata: Q5432619
  wikipedia: False (logic)
inventory: [JQA9J4E2F2]
---

## Summary

In logic, **false** (Its noun form is falsity) or **untrue** is the state of possessing negative truth value and is a nullary logical connective. In a truth-functional system of propositional logic, it is one of two postulated truth values, along with its [[negation|029JBBF693]], truth. Usual notations of the false are 0 (especially in Boolean logic and computer science), O (in prefix notation, O*pq*), and the up tack symbol $\bot$.