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Reductio ad absurdum, painting by John Pettie exhibited at the Royal Academy in 1884. In logic, reductio ad absurdum (Latin for "reduction to absurdity"), also known as argumentum ad absurdum (Latin for "argument to absurdity") or apagogical argument, is the form of argument that attempts to establish a claim by showing that the opposite scenario would lead to absurdity or contradiction.
[88] (opposite of appeal to tradition) Appeal to poverty (argumentum ad Lazarum) – supporting a conclusion because the arguer is poor (or refuting because the arguer is wealthy). (Opposite of appeal to wealth.) [89] Appeal to tradition (argumentum ad antiquitatem) – a conclusion supported solely because it has long been held to be true. [90]
Argumentum ad populum is a type of informal fallacy, [1] [14] specifically a fallacy of relevance, [15] [16] and is similar to an argument from authority (argumentum ad verecundiam).
For instance, the appeal to poverty is the fallacy of thinking that someone is more likely to be correct because they are poor. [25] When an argument holds that a conclusion is likely to be true precisely because the one who holds or is presenting it lacks authority, it is an "appeal to the common man". [26]
Appeal to consequences, also known as argumentum ad consequentiam (Latin for "argument to the consequence"), is an argument that concludes a hypothesis (typically a belief) to be either true or false based on whether the premise leads to desirable or undesirable consequences. [1]
Appeal to emotion or argumentum ad passiones (meaning the same in Latin) is an informal fallacy characterized by the manipulation of the recipient's emotions in order to win an argument, especially in the absence of factual evidence. [1]
An example of an argument to moderation would be considering two statements about the colour of the sky on Earth during the day – one claiming, correctly, that the sky is blue, and another claiming that it is yellow – and incorrectly concluding that the sky is the intermediate colour, green.
For example, a fallacious arguer may claim that "bears are animals, and bears are dangerous; therefore your dog, which is also an animal, must be dangerous." When it is an attempt to win favor by exploiting the audience's preexisting spite or disdain for something else, it is called guilt by association or an appeal to spite ( Latin ...