Invalidation Bias

A bias where one systematically invalidates sources of opposing information—attacking credibility, questioning motives, dismissing expertise—rather than engaging the information itself. Invalidation Bias doesn't need to refute claims; it just needs to discredit the source. If the source can't be trusted, the information doesn't need to be considered.

"He never addressed her arguments—just attacked her credentials, her funding, her personal life. Invalidation Bias: when you can't beat the message, discredit the messenger. The information remains unaddressed, but that's the point. Invalidate first, think never."

Invalidation Bias by Dumu The Void March 4, 2026