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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 ...
The Van Gogh Fallacy is an example of a logical fallacy. It is a type of fallacy wherein the conclusion is affirmed by its consequent (fallacy of affirming the consequent) instead of its antecedent (modus ponens). [1] [2] Its name is derived from a particular case that argues:
For example: No fish are dogs, and no dogs can fly, therefore all fish can fly. The only thing that can be properly inferred from these premises is that some things that are not fish cannot fly, provided that dogs exist. Or: We don't read that trash. People who read that trash don't appreciate real literature. Therefore, we appreciate real ...
In propositional logic, modus ponens (/ ˈ m oʊ d ə s ˈ p oʊ n ɛ n z /; MP), also known as modus ponendo ponens (from Latin 'mode that by affirming affirms'), [1] implication elimination, or affirming the antecedent, [2] is a deductive argument form and rule of inference. [3] It can be summarized as "P implies Q. P is true. Therefore, Q ...
Download as PDF; Printable version; ... This category is for fallacies of propositional logic, ... Argument from fallacy
The fallacies Aristotle identifies in Chapter 4 (formal fallacies) and 5 (informal fallacies) of this book are the following: Fallacies in the language or formal fallacies (in dictionem):
Logical Fallacies, Literacy Education Online; Informal Fallacies, Texas State University page on informal fallacies; Stephen's Guide to the Logical Fallacies (mirror) Visualization: Rhetological Fallacies, Information is Beautiful; Master List of Logical Fallacies, University of Texas at El Paso; Fallacies, Internet Encyclopedia of Philosophy
Negative conclusion from affirmative premises is a syllogistic fallacy committed when a categorical syllogism has a negative conclusion yet both premises are affirmative. The inability of affirmative premises to reach a negative conclusion is usually cited as one of the basic rules of constructing a valid categorical syllogism.