With people it is difficult.
Here the student will hear somewhere that 2 + 2 is equal to 5 and will then begin to tell everyone that this is the case, and those who do not agree - cover with vulgar epithetics, such as lagging behind life. But the student immediately realizes that he is a fool. But if the 45-year-old man in a jacket begins to tell the same thing, you already involuntarily think, maybe he says it, because he knows something you don’t know. Especially if he is not rude to opponents, but just subtly follows them. In the crowd he will always find supporters who will consider him a guru, and only a few will be able to recognize in this authoritative, respected man the most ordinary fool.