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Circular reasoning (Latin: circulus in probando, "circle in proving"; [1] also known as circular logic) is a logical fallacy in which the reasoner begins with what they are trying to end with. [2] Circular reasoning is not a formal logical fallacy, but a pragmatic defect in an argument whereby the premises are just as much in need of proof or ...
Closely connected with begging the question is the fallacy of circular reasoning (circulus in probando), a fallacy in which the reasoner begins with the conclusion. [26] The individual components of a circular argument can be logically valid because if the premises are true, the conclusion must be true, and does not lack relevance. However ...
A circular definition is a type of definition that uses the term(s) being defined as part of the description or assumes that the term(s) being described are already known. There are several kinds of circular definition, and several ways of characterising the term: pragmatic , lexicographic and linguistic .
Fallacies of definition are the various ways in which definitions can fail to explain terms. The phrase is used to suggest an analogy with an informal fallacy. [1] Definitions may fail to have merit, because they are overly broad, [2] [3] [4] overly narrow, [3] [4] or incomprehensible; [4] or they use obscure or ambiguous language, [2] contain mutually exclusive parts, [3] or (perhaps most ...
Circular reasoning (circulus in demonstrando) – the reasoner begins with what they are trying to end up with (e.g.: all bachelors are unmarried males). Fallacy of many questions (complex question, fallacy of presuppositions, loaded question, plurium interrogationum ) – someone asks a question that presupposes something that has not been ...
Diverting the argument to unrelated issues with a red herring (Ignoratio elenchi) Insulting someone's character (argumentum ad hominem) Assuming the conclusion of an argument, a kind of circular reasoning, also called "begging the question" (petitio principii) Making jumps in logic (non sequitur)
The circular argument, in which the proof of some proposition presupposes the truth of that very proposition; The regressive argument, in which each proof requires a further proof, ad infinitum; The dogmatic argument, which rests on accepted precepts which are merely asserted rather than defended
The Cartesian circle (also known as Arnauld's circle [1]) is an example of fallacious circular reasoning attributed to French philosopher René Descartes. He argued that the existence of God is proven by reliable perception, which is itself guaranteed by God.