@footfootfoot --
Relative positions, eh? Because their relative positions never change, the hunter does not go around the squirrel. That's your story? Please note that the relative positions of the hunter and the tree are also unchanging, yet, the tree is "gone around". The "object of the question" doesn't define the circle.
How do you make a circle? How do you go around something?
@glatt --
I skimmed your link, interesting.
Yaknow, I didn't bother with the whole plane on a treadmill kerfuffle. I found it a bit irritating. I get it now.
