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Whately divided fallacies into two groups: logical and material. According to Whately, logical fallacies are arguments where the conclusion does not follow from the premises. Material fallacies are not logical errors because the conclusion follows from the premises. He then divided the logical group into two groups: purely logical and semi-logical.
Persuasive definition – purporting to use the "true" or "commonly accepted" meaning of a term while, in reality, using an uncommon or altered definition. (cf. the if-by-whiskey fallacy) Ecological fallacy – inferring about the nature of an entity based solely upon aggregate statistics collected for the group to which that entity belongs.
These paradoxes may be due to fallacious reasoning , or an unintuitive solution . The term paradox is often used to describe a counter-intuitive result. However, some of these paradoxes qualify to fit into the mainstream viewpoint of a paradox, which is a self-contradictory result gained even while properly applying accepted ways of reasoning .
An etymological fallacy becomes possible when a word's meaning shifts over time from its original meaning. Such changes can include a narrowing or widening of scope or a change of connotation (amelioration or pejoration). In some cases, modern usage can shift to the point where the new meaning has no evident connection to its etymon.
Unless it has previously been established that her outfit is a dress, the question is fallacious because she could be wearing pants instead. [ 28 ] [ 29 ] Another related fallacy is ignoratio elenchi or irrelevant conclusion : an argument that fails to address the issue in question, but appears to do so.
Christopher Tindale gives a definition that only fits the causal type. He says: "Slippery Slope reasoning is a type of negative reasoning from consequences, distinguished by the presence of a causal chain leading from the proposed action to the negative outcome." [4]: 185
Ad hominem (Latin for 'to the person'), short for argumentum ad hominem, refers to several types of arguments that are usually fallacious.Often currently this term refers to a rhetorical strategy where the speaker attacks the character, motive, or some other attribute of the person making an argument rather than the substance of the argument itself.
In rhetoric and ethics, "two wrongs don't make a right" and "two wrongs make a right" are phrases that denote philosophical norms. "Two wrongs make a right" has been considered as a fallacy of relevance, in which an allegation of wrongdoing is countered with a similar allegation.