So let me actually go through that exercise. It really is a little bit like a game. So someone comes up to you and says, well, OK, I don't necessarily believe that you're claiming that the limit of f of x as x approaches c is equal to L. I'm not really sure if that's the case. But I agree with this definition. So I want to get f of x within 0.5 of L. So this right over here would be L plus 0.5. And this right over here is L minus 0.5. And then you say, fine, I'm going to give you a range around c that if you take any x within that range, your f of x is always going to fall in this range that you care about.