The word for today is…
fallacy (noun):
1a : a false or mistaken idea
b : erroneous character
2a : deceptive appearance
b obsolete : guile, trickery
3 : an often plausible argument using false or invalid inference
Source : Merriam -Webster
Etymology : Philosophers are constantly using the word fallacy. For them, a fallacy is reasoning that comes to a conclusion without the evidence to support it. This may have to do with pure logic, with the assumptions that the argument is based on, or with the way words are used, especially if they don’t keep exactly the same meaning throughout the argument. There are many classic fallacies that occur again and again through the centuries and everywhere in the world. You may have heard of such fallacies as the “ad hominem” fallacy, the “question-begging” fallacy, the “straw man” fallacy, the “slippery slope” fallacy, the “gambler’s” fallacy, or the “red herring” fallacy.
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