Rationalized Bias

A sophisticated form of self-deception where one's pre-existing prejudices, desires, or ideological commitments are retroactively supported by elaborate, internally consistent rationalizations. The person constructs a logical-sounding edifice to justify a conclusion they arrived at for emotional or tribal reasons, believing themselves to be purely rational. The bias lies in the motivated reasoning that builds the rationale.

Example: A person opposed to immigration reform crafts a complex argument citing selective economic studies, abstract principles of sovereignty, and crime statistics. This Rationalized Bias allows them to believe their stance is reasoned, when its roots are in unexamined cultural anxiety and identity politics. The logic serves the bias, not the truth.

by Dumu The Void February 4, 2026

Rationalization Bias

The innate cognitive drive to construct post-hoc, self-serving reasons for our actions, beliefs, or the status quo, in order to maintain a view of ourselves and our world as consistent, sensible, and just. It is the bias that powers the "just-world fallacy," making us invent reasons why victims deserve their fate or why our choices were optimal.

Example: After buying an excessively expensive car, you tell yourself, "It's an investment in safety and reliability, and it will hold its value," minimizing the role of status-seeking. This rationalization bias protects your self-image as a pragmatic person, not a show-off.

by Dumu The Void February 9, 2026

Rational Bias

The cognitive distortion where one's own reasoning is perceived as perfectly objective, simply because it follows internal logical rules, while ignoring that the starting premises, value judgments, and framing of the problem are themselves subjective, emotional, or culturally loaded. It's the bias of believing you're bias-free because you feel coldly logical.

Example: A CEO making a "rational" decision to offshore jobs after a dispassionate cost-benefit analysis. Their rational bias allows them to ignore the premises they accepted without question: that shareholder value is the supreme metric, and that community destruction is an external "cost" not factored in.

by Dumu The Void February 9, 2026