"Repetition makes a fact seem more true, regardless of whether it is or not. It is a law of propaganda often attributed to the Nazi Joseph Goebbels. Understanding this effect can help you avoid falling for propaganda, says psychologist Tom Stafford".....
...."The key finding is that people tend to rate items they've seen before as more likely to be true, regardless of whether they are true or not, and seemingly for the sole reason that they are more familiar".... Click to read Tom Stafford's article published by the BBC on October 26, 2016