Well, that's the beauty of this game - you can't. Maybe we would have one if we knew the exact skills of all of the opponents players, but we don't.
A lot of stuff in this game is a bit "unknown" and left to speculate or test. We know the "basics", but we don't know the exact details. For example, how much does Inside Shot contribute to Layups? How much does Shot Blocking contribute to defense? Etc. It's all for us to discover and that's why I like this game.