# 49. Manipulation of bias and heuristics in decision making ## 49.5. Methodology/Refinements/Sub-species ### 49.5.56. Reactive devaluation This is the propensity to devalue proposals that are no longer hypothetical or purportedly originated with an adversary. A manipulator can discredit a proposal in the eyes of a victim by attributing them (truthfully or falsely) to an adversary of the victim.