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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. [6]
Even non-deductive arguments can be said to be fallacious: for example, an inductive argument that incorrectly applies principles of probability or causality. But "since deductive arguments depend on formal properties and inductive arguments don't, formal fallacies apply only to deductive arguments". [5]
Argument from fallacy is the formal fallacy of analyzing an argument and inferring that, since it contains a fallacy, its conclusion must be false. [1] It is also called argument to logic ( argumentum ad logicam ), the fallacy fallacy , [ 2 ] the fallacist's fallacy , [ 3 ] and the bad reasons fallacy .
This reasoning is a fallacy of relevance: it fails to address the proposition in question by misrepresenting the opposing position. For example: Quoting an opponent's words out of context—i.e., choosing quotations that misrepresent the opponent's intentions (see fallacy of quoting out of context). [3]
There is a debate over whether the argument from ignorance is always fallacious. It is generally accepted that there are only special circumstances in which this argument may not be fallacious. For example, with the presumption of innocence in legal cases, it would make sense to argue: [5] It has not been proven that the defendant is guilty.
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). [ 14 ] [ 4 ] [ 9 ] It uses an appeal to the beliefs, tastes, or values of a group of people, [ 12 ] stating that because a certain opinion or attitude is held by a ...
In logic and philosophy, a formal fallacy [a] is a pattern of reasoning rendered invalid by a flaw in its logical structure. Propositional logic, [2] for example, is concerned with the meanings of sentences and the relationships between them. It focuses on the role of logical operators, called propositional connectives, in determining whether a ...
In propositional logic, affirming the consequent (also known as converse error, fallacy of the converse, or confusion of necessity and sufficiency) is a formal fallacy (or an invalid form of argument) that is committed when, in the context of an indicative conditional statement, it is stated that because the consequent is true, therefore the ...