This document discusses the differences between modern art and graffiti. It notes that modern art artists typically have classical art training, while graffiti artists usually do not have artistic training. It also provides examples of conversations where people analyze and interpret meanings behind a strange modern art painting depicting a sleeping woman surrounded by red. The document concludes with examples of using modal verbs like "is", "can", "might" to express degrees of certainty or uncertainty about something potentially being a car.