> Unless, of course, you're referring to the underlying philosophical reasons why it's true, to which my usual answer would be: math is a game with certain simple rules that play well together and have long-reaching consequences. It's a game we choose to play.

Isn't it interesting that this game we choose to play is so effective at modelling the world around us? I suppose you could argue that we wouldn't have put so much effort into this formulation of the game if it wasn't.