There is a riddle about a man who is locked in a room with nothing but a bed and a calendar, and the question is: How does he survive? The answer is: He eats dates from the calendar and drinks from the springs of the bed.
Was he joking? Was he being sarcastic? Aggressive? Impertinent? Or just courteous? There was no telling from his impassive face. What a country, he thought despairingly. In Russia you always knew. If a man made a stern face he was threatening; if he was laughing uproariously, he was joking.