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</tr> </table> The third cause fallacy is a logical fallacy that asserts that X causes Y when, in reality, X and Y are both caused by Z. It is a variation on the post hoc ergo propter hoc fallacy and a member of the questionable cause group of fallacies.
When third causes are ignored, it becomes possible to corral shocking statistical evidence in support of a nonexistent causality. For example:
The fallacy in this situation would be the fact that the arguer focused on the first (beer cans) and second (car crashes) facts without looking for possible causes of both phenomena, such as drunk driving.
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