Final answer:
The bandwagon fallacy, also referred to as Ad populum, occurs when believing something is true because many people believe it, relying on popularity as proof.
Explanation:
The logical fallacy also known as the bandwagon fallacy is formally termed as the Ad populum. This fallacy occurs when someone assumes that something is true just because many people believe it to be true, appealing to the popularity of an idea as its primary support. For instance, asserting that an idea must be correct because everyone believes it is an illustration of this fallacy.
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