Answer:
Step-by-step explanation:
indoctrination: it is a form of brainwashing where you train people not to think.
You are censoring outside thought, but brainwashing means that you make them think one central philosophy.
Propaganda is telling a lie often enough until it is believed by nearly everyone in the population.
Philosophy is the open discussion of any idea no matter where it leads. It is the opposite of brainwashing.