Consensus Gentium

Latin for, agreement of the people

That idea that the general agreement among people is a sufficient condition of truth: “If everybody believes it, it must be true.”

The weakness of this criterion is obvious: throughout human history the consensus beliefs of humanity (e.g., geocentrism) have turned out to be false.

This principle reverses the appropriate order for determining the veracity of belief; a belief is not true because it is believed, it should be believed because it is true. More simply, believing something doesn’t make it true.