Package-deal fallacy

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The package-deal fallacy (also known as false conjunction) is the logical fallacy of assuming that things often grouped together by tradition or culture must always be grouped that way. False conjunction refers to misuse of the and operator.

It is particularly common in political arguments, such as the following imagined example from the United States: "My opponent is a conservative who voted against higher taxes and welfare, therefore he will also oppose gun control and abortion." While those four positions are often grouped together as "conservative" in United States politics, a person may believe in one "conservative" idea while not believing in another.