We all know something about art to varying degrees, have heard something, noticed something by chance, and have been deeply convinced of something since childhood. When we come to the museum, the guide becomes an intermediary between us and art. It is he who can answer the question we are interested in here and now. But sometimes, for one reason or another, he fails to do this, and we do not always dare to ask about something. Alina Nikonova - art critic and blogger - answers questions that you did not dare to ask:- why did Picasso paint such strange paintings and what is ingenious about them? - how to distinguish a good picture from a bad one? - how much is everything that is in museums worth? - is there something mystical in ancient Egyptian art? - why are some paintings attacked by madmen? - how to understand the paintings of Salvador Dali if they are so unusual?