It sounds like a semantic issue, then. I believe the original post was speaking about the misinformed (those passing off the lie as if it were truth, for they think it is the truth), not about the actual creators of the lie (which is who, I believe, you were referring to).

Though, the original creators of the lie could have just came to an incorrect conclusion and was too stubborn or thick-headed to admit error, or was never challenged. There may have never been an intention to deceive. Just throwing around possibilities.