About the inscriptions on the fence.
When they studied in the Saratov universe on 1st course, at the entire stream the higher mathematics was led by Prep Ivanov. The first in the life of the first couple he started literally with the phrase 'you all, biologists, full of nothingness'. The couple went into a stream auditorium with a raised board where our tormentor wrote his hellish formulas. The only thing that warmed our souls was the inscription with a crumb on the wall above the board, so that it can only be seen from the top rows: 'Ivan's goat'. This inscription was not washed all five years while I was studying. Continuity of Generations.