You have to make up. So the ball,which is a physical object, only becomes meaningful as a football within thecontext of the rules of the game. The only way you play is to develop a game ora language game about football: “You can put it there; You can’t put it there. Youcan’t touch it; You can’t kick it, etc.” Within the rules, it becomes a football.
This is even more evidence for the previous claims in this. It dips into philosophical reasoning for why things are certain things. the football does not have purpose or meaning until you put it in the context of a football game and on a football field. We give things meanings to support our world view.