Small truths — truth-salting — is the practice of sprinkling accurate, easily verifiable facts through a message so that an unverifiable falsehood at its center inherits their credibility. It is a staple of disinformation, con artistry, and manipulative sales because it costs the deceiver almost nothing: the true details are real, they check out, and each confirmation quietly raises the audience’s willingness to accept the claim that doesn’t.
Two mechanisms do the work. The first is trust transfer — having verified three claims, we heuristically extend belief to a fourth rather than pay the cost of checking it, especially when the true details establish the speaker as someone who “knows things.” The second is the illusory-truth effect (Hasher, Goldstein and Toppino, 1977): repeated or familiar-feeling statements are judged more true regardless of their accuracy, and the surrounding truths make the whole package feel familiar.
The defense is to distinguish the load-bearing claim from the decorative ones. Honest information survives having its central assertion traced to primary sources; truth-salted deception collapses there, because the one claim that matters is precisely the one built to resist verification. Check that claim on its own — the accuracy of everything around it tells you nothing about the core.