But this rigorous definition is giving us the same conclusion. The limit as we approach X equals C from the left and the right, it's a different value than F of C, and so this is not continuous. Not, not continuous. And let's think about another scenario. Let's think about a scenario, and actually, maybe let's think about a scenario where the limit, the two-sided limit doesn't even exist. So, there are my axes, X and Y, and let's say it's doing something like this. Let's say it's doing something like this, and then it does something like this and goes like that.