But because it's so applicable to so many things, it's often a misused law or sometimes a slightly misunderstood. So just to be a little bit formal in our mathematics, let me just define it for you first. And then we'll talk a little bit about the intuition. So let's say I have a random variable X. And we know its expected value or its population mean. The law of large numbers just says that if we take a sample of n observations of our random variable, and if we were to average all of those observations, and let me define another variable, let's call that X sub n with a line on top of it, this is the mean of n observations of our random variable. So it's literally, this is my first observation.