When you think of a hole, there are two different values, the empty space (which is a positive value when you want to know how much space you have available), and the ground surrounding the empty space (which is a positive value when you want to know how much dirt you have available). But the empty space and the ground are not both positive values at the same time.
In math, numbers can have words attached to them. Like this:
1 orange + 1 orange= 1 oranges, not 1 orange + 1 apple= 2 fruit. This is because if you were wanting to find out how many fruit you have, you would do it like this: 1 fruit + 1 fruit= 2 fruit. Because you could also do it like this 1A+1A=2A.
So when you're trying to find out how much empty space you have, in that moment, you are not looking for how much dirt you have in a given space, and during that time, the dirt is a non-value, in other words, 0 space. This is because you do not understand how the dirt would be space, it is nothing to you in that sense.
In a math problem when you want to try and find how much dirt you have as well as how much space, you could do that, but the dirt and the space would not ever merge in values because you can't add dirt and space together and get just dirt or just space, they will always remain separate. So when you see the value of the hole as being the dirt and the space, you are seeing the equivalent of 2 different things in one location, not 1 thing.
A computer is not just 1 thing either, it's a collection of things that have 1 purpose, to function as a computer, but that's a function, a computer is not truly a single object, it's a function that occurs when many small parts exist together in a certain way.
If you want to summarize what a computer or a hole is that's fine, but you need to remember that they are not truly 1 thing.