We are sitting on a pair with an old mathematician. An old plague living in his distant mathematical world. He is always interested in the origin of all interesting words. So, one day he, apparently hearing the word "pedic" and considering its origin, came to the conclusion that this is a shortcut from the word "pedagogue", and here one day on a couple, somehow it came to teaching methods, he gave us: "We, the pedagogues, each have their own methods."