Sometimes your brain just sees a one and that little negative sign there, and you're like, oh, this must be a weird way of writing negative one, or you don't even think about it. But it's not saying that. It's saying, this is saying, let me put a little arrow here, this is the limit of f of x as x approaches one from the left. From the left. So from the left, how do we know that? Well, that's what that little negative tells us. It tells us we're approaching one from values less than one.