[npsimons]

> it sounds like you're describing the possibility of calculating his expected weight gain based on how much he ate and how much he exercised, and I don't think that's possible.

This is a joke right? This is exactly how you calculate expected weight gain/loss.

[smcl]

If you can do this accurately for an arbitrary person, you will be the world's most celebrated dietician so I encourage you to go ahead and publish exactly how you're doing this.