irrationaalseid

Irrationaalseid is a term used in some philosophical and cognitive science discussions to denote the irrational aspects of human judgment that persist alongside rational deliberation. The word is a contemporary neologism, blending the English irrational with a suffix that suggests a state or condition, and is mainly encountered in online discourse and some fringe scholarship.

In conceptual usage, irrationaalseid refers to stable, affect-driven forces that bias perception and decision making, including emotions, motivated reasoning, and cognitive dissonance, which operate even when people have access to relevant information. It is often discussed within dual-process theories of judgment, bounded rationality, and cognitive biases, serving as a shorthand for the irrational side of decision making rather than a formal category.

The term is not widely standardized, and definitions vary. As such, irrationaalseid remains largely informal outside specialized debates and is more common in introductory discussions of irrationality and in speculative or exploratory contexts.