Ad nauseam

This uses tireless repetition of an idea. An idea, especially a simple slogan, that is repeated enough times, may begin to be taken as the truth. This approach is more effective alongside the propagandist limiting or controlling the media.

Repeating the same thing makes it more available to other people, which they then may confuse with statistics to assume that this makes it more probable. It also makes the speaker more confident. If I say something repeatedly, it must be because it is true.

However, it still remains that repeating something does not make it true.

Ad nauseam is a Latin term for an argument or other discussion that has continued to the point of nausea. For example, "this has been discussed ad nauseam" indicates that the topic has been discussed extensively and those involved have grown sick of it.

Nagging is also a way of wearing people down. Eventually they will agree with you just to get you off their backs. There is also danger in this, as it can drive people away or result in them snapping back at you. They may reduce their commitment as they feel you are trying to control them.