Mythbusters! Not 0
Attempting to bust myths apparently implants them.
This phenomenon may help explain why large numbers of Americans incorrectly think that Saddam Hussein was directly involved in planning the Sept 11, 2001, terrorist attacks, and that most of the Sept. 11 hijackers were Iraqi. While these beliefs likely arose because Bush administration officials have repeatedly tried to connect Iraq with Sept. 11, the experiments suggest that intelligence reports and other efforts to debunk this account may in fact help keep it alive.
Which, I guess, explains why so many persons continue to think that the Republican Party knows what it is doing. From Dan Froomkin:
A lie repeated often enough becomes a truth.
At least for folks who refuse to think critically.
Sad, ain’t it?