# 46. Logical Manipulation ## 46.5. Methodology/Refinements/Sub-species ### 46.5.7. Argumentum ad ignorantiam An argument to ignorance. This is another logical fallacy of irrelevance, occurring when one claims that something is true only because it hasn't been proved false, or that something is false only because it has not been proved true. Some manipulators are successful delivering this fairly cheap trick with some victims and audiences.