>>> The basic skills of this matter, by the way, are given even in school.

Yes, there are so many basic skills in school that not everyone remembers them. Only a day ago one character was explained how the radius differs from the diameter, and he in response objected that he did not study for an engineer and does not know this difference. He was tried to explain that he should have understood this difference in the sixth grade, but he was still trying to prove that he was required too much.