“Legend has it that Pavlov once reprimanded an assistant who arrived late for an experiment because of trying to avoid street fighting in the midst of the Russian Revolution. The assistant defended his tardiness, saying, “But, professor, there’s a revolution going on, with shooting in the streets!” Pavlov supposedly replied, “What the hell difference does a revolution make when you’ve work to do in the laboratory? Next time there’s a revolution, get up earlier!””