So they're not independent at all. So in this situation, if someone said, let's just say, for the sake of argument, that the variance of X, the variance of X, is equal to, I don't know, let's say it's equal to four, and the units for variance would be squared hours, so four hours squared. We could say that the standard deviation for X in this case would be two hours. And let's say that the variance, let's say the standard deviation of Y is also equal to two hours. And let's say that the variance of Y, variance of Y, well, it would be the square of the standard deviation, so it would be four hours, four hours squared would be our units. So if we just tried to blindly say, oh, I'm just gonna apply this little expression, this claim we had, without thinking about the independence, we would try to say, well, then the variance of X plus Y, the variance of X plus Y, must be equal to the sum of their variances. So it would be four plus four.