“Repeat a lie often enough and it becomes the truth” – Joseph Goebbels, Nazi propagandist.

The illusory truth effect (also known as the illusion of truth, truth effect, or the reiteration effect) is the tendency to believe in false information after hearing it repeatedly.

There’s actually a reasonable explanation for this – we hear hundreds and thousands of new information everyday, and it take too much effort to carefully evaluate and think about everything we hear. So, one of the shortcuts that we take is to compare what we hear against what we already know (or at least believe) to be true.

Question EVERYTHING !