# Facticity | | In philosophy, **Facticity** has multiple meanings--from "factuality" and "contingency" to the intractable conditions of human existence. | |-|-| | | wikipedia:: [Facticity](https://en.wikipedia.org/wiki/Facticity) | Multiple meanings A fundamental thing, at the most reduced level and which resists further reduction or explanation. A bare fact. [[Martin Heidegger]] [[Johann Gottlieb Fichte]] [[Haecceity]] [[Atomism]] > Facticity plays a key part in Quentin Meillassoux's philosophical project to challenge the thought-world relationship of correlationism. Meillassoux defines it as “the absence of reason for any reality; in other words, the impossibility of providing an ultimate ground for the existence of any being.”[3]