Wilhelm Dilthey
The term is first used by German philosopher Johann Gottlieb Fichte (1762-1814) and has a variety of meanings. It can refer to facts and factuality, as in nineteenth-century positivism, but comes to mean that which resists explanation and interpretation in Wilhelm Dilthey and Neo-Kantianism. The Neo-Kantians contrasted facticity with ideality, as does Jürgen Habermas in "Between Facts and Norms" ("Faktizität und Geltung").