I know what you mean, and a number that is not infinitely precise is an interval (i.e. a set of numbers).
e is a number that is quite hard to pin on the imaginary number line, because the chances of hitting it with a pin is virtually zero. But the same argument can be made about the number 2 or 3. Those are just notations to abstract ideas, even though it is easier to formulate analogies for some of those numbers.
Now, formalising that above sentence even with symbols is quite difficult.
Now, formalising that above sentence even with symbols is quite difficult.