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Equivocation in a syllogism (a chain of reasoning) produces a fallacy of four terms (quaternio terminorum). Below is an example: Since only man [human] is rational. And no woman is a man [male]. Therefore, no woman is rational. [1] The first instance of "man" implies the entire human species, while the second implies just those who are male.
A false equivalence or false equivalency is an informal fallacy in which an equivalence is drawn between two subjects based on flawed or false reasoning. This fallacy is categorized as a fallacy of inconsistency. [1] Colloquially, a false equivalence is often called "comparing apples and oranges."
Argument from fallacy (also known as the fallacy fallacy) – the assumption that, if a particular argument for a "conclusion" is fallacious, then the conclusion by itself is false. [ 5 ] Base rate fallacy – making a probability judgment based on conditional probabilities , without taking into account the effect of prior probabilities .
In everyday reasoning, the fallacy of four terms occurs most frequently by equivocation: using the same word or phrase but with a different meaning each time, creating a fourth term even though only three distinct words are used. The resulting argument sounds like the (valid) first example above, but is in fact structured like the invalid ...
Traditionally, a great number of informal fallacies have been identified, including the fallacy of equivocation, the fallacy of amphiboly, the fallacies of composition and division, the false dilemma, the fallacy of begging the question, the ad hominem fallacy and the appeal to ignorance. There is no general agreement as to how the various ...
The fallacy is sometimes presented as "let's agree to disagree". [3] Whether one has a particular entitlement or right is irrelevant to whether one's assertion is true or false. Where an objection to a belief is made, the assertion of the right to an opinion side-steps the usual steps of discourse of either asserting a justification of that ...
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Equivocation is a logical fallacy whereby an argument is made with a term which changes semantics in the course of the argument.. Equivocation may also refer to: . Equivocation (information theory), measures the amount of information that is contained in a random variable or other unknown quantity, given the knowledge over another random variable