When you were a kid and you were pouring more than one glass of chocolate milk, for yourself and your siblings you really tried hard to make all the glasses as equal as possible, but someone always felt that their glass was slightly lower than the others. My point is that it is an ideal that is noble and worth pursuing, but rarely acheived in the absolute. But so long as we continue to pursue it, over a life time we should all end up getting the same amount of chocolate milk.