Comment by awesome_dude

Initially I too thought - but we try to approximate infinity in CS all the time.

But I have come to think, well actually, approximate is doing some heavy lifting there AND I have never used infinity for anything except to say "look I don't know how high this should go, so go as far as you can go, and double that, which is really saying, you are bound by finite boundaries, you'll have to work within them, and the uncountable thing that I was thinking about is really finite.

Edit: Think of it like this

We know that it's most likely that the universe is infinite, but we can only determine how big it is by how far we can see, which is bounded by the speed of light, and the fact that we can only see matter emitting light (I'm being careful here, if the big bang theory is right, and I am understanding it correctly, there is a finite amount of matter in the universe, but the universe itself is infinite)