Very interesting. Of course Soulty makes more sense.
You think about things too much Bono. There isn't an elaborate maze to the answer to every question.
And I'm afraid Soulty is correct, the second you ask "why" in Math class, the whole system breaks down. I've never heard anything more than simply a slightly more elaborate explanation to something that is still based on sound, but nonetheless unproven theories.
The answer to "why does 2+2=4?" is the same to "Why does it take 3 women with PMS to change a light bulb?"
IT JUST DOES!@!!!!!!!!!!!!!!
To better explain:
It's like asking a Creationist "how do you know the earth was created by God" and they answer "because creation is so complicated. Only an intelligent being could create this."
When you believe the only logical answer is A, then somehow, magically, A becomes the only logical answer. And we all live our merry little lives until we discover "well, sh**t! B makes sense as well... and C does too a little bit.. or maybe it's D, all of the above!"
Because we (originally) defined '2' and '4' in terms of quanities, the amount of crops or goods for instance (so we are back on apples and oranges). So in that system of course 2 (of something) added to another 2 of something which is the same is equal to 4. Once you deal with the abstraction of pure arithmetic then you run into those problems..