But try to construct a discontinuous function where you will be able to find this. It is very, very hard. And you might say, well what about the situations where F is not even defined at C? Which for sure, you're not gonna be continuous if F is not defined at C. Well if F is not defined at C, then this part of the expression wouldn't even make sense. So you definitely wouldn't be differentiable. But now let's ask another thing. I've just given you good arguments for when you're not continuous, you're not going to be differentiable.