Good point. If B was just happening all the time, then a B would always happen after A. Have to make sure the inverse is true. Though if B happens all the time

Good point. If B was just happening all the time, then a B would always happen after A. Have to make sure the inverse is true. Though if B happens all the time, but also A causes B. Then there's really no way to establish causation. "The Channel four studio has electrical sensors that will trip and broadcast the simpsons either at 5pm or when I turn on my TV at 5pm."