Brainwashing, also known as "ideological reform" or "re-education", is to change the belief or behavior of a person or a group of people through lobbying, which is mostly used in politics or religion. The biggest difference between brainwashing and propaganda is that brainwashing is compulsory, long-term and asymmetric (that is, it prevents lobbyists from contacting opposing news). This word is derogatory. It means to empty people's memory and replace it with some new knowledge.

Brainwashing also often has commercial applications, such as advertisements and pop songs. Repeated [source request] playback is called popular, popular, and popular.

In many science fiction novels, the act of changing or erasing memories in people's brains with scientific instruments is also called brainwashing. However, with the medical technology of 2 1 century and the cognition of human brain, this kind of behavior is technically impossible for the time being.