James McGrath speaks about confronting proponents of Young-Earth creationism, Intelligent Design, and the Protocols of the Elders of Zion
I think that one aspect [of expressing doubt to conspiracy theorists] is to learn to speak confidently about our uncertainty, so as to be able to not merely say “Perhaps” and “Possibly” but a direct and forthright “You have no way of knowing that” and “Your confidence is simply a feeling you have, but it isn’t justified by the evidence.”