A falsism is a claim that is clearly and self-evidently wrong. A falsism is usually used merely as a reminder or as a rhetorical or literary device. An example is "pigs can fly". It is the opposite of a truism. A falsism is similar to, though not the same as, a fallacy. See also Absurdity (logic) Straw Man argument Ad Hominem fallacy Slippery Slope fallacy References Informal fallacies Rhetoric Communication of falsehoods