Illusory truth effect

What it is

Coming to believe statements that are repeated, because familiarity feels like truth, even when we once knew better.

Example A rumour you have heard five times starts to feel true.

Appeal to popularity fallacy
When many repeat a claim, it feels familiar and therefore true, which fuels the bandwagon.
Argument from repetition fallacy
Argument from repetition works because of the illusory truth effect: repeated statements feel true.
Availability cascade bias
Public repetition drives both: claims feel truer and more important the more they circulate.
Mere-exposure effect bias
The same mechanism, repeated exposure, makes things feel pleasant and also feel true.
Misinformation effect bias
Repetition makes false claims and false memories feel true.
Sleeper effect bias
As we forget where a message came from, we remember it as familiar and credible.