So let's look at this. At 0.9, f of x is 2.5. When we get even closer to one from the left, we go to 2.1. When we get even closer to one from the left, we're getting even closer to two. So a reasonable estimate for the limit as x approaches one from the left of f of x, it looks like x, it looks like f of x, right over here, is approaching two. We don't know for sure. That's why they're saying what is a reasonable estimate.