It would not be fair if they gave 1.999 as a choice and 2.01. But if you were saying, hey, maybe this is approaching a whole number, then two could be a reasonable estimate right over here, although it doesn't have to be two. It could be 2.01258. It might be what it is actually approaching. So let's try another example here. Here it does look like there's a reasonable estimate for the limit as we approach this value from the left. So now it says the function f is defined over the real numbers.