Well, let's go back to one of the early definitions we use for probability. And that says, the probability of anything happening is the probability of the number of equally probable events in which what we're stating is true. So the number of events, I guess trials or situations, in which we get three heads. And exactly three heads. We're not saying greater than three heads. So four heads won't count, and two heads won't count, five heads won't. Only three heads.