William solved this in his "Pragmatism"...he tells the story of several men out camping when they saw a squirrel on a tree. They tried to get a better look, but the squirrel kept moving to keep the tree between himself and the men, so they fell to arguing whether they were walking "around" the squirrel or not, since the squirrel was always facing them.

One man (the Philosopher)came in late and told them simply that there IS no absolute answer, but it simple depended on a decision to adopt a common definition. If you all decide to mean by "around", being first to the north of the squirrel, then to the other directions, then the answer is yes, you were going around the squirrel (that is, the tree was the referent). If, however, you mean getting to the place you can see the squirrel's back, then the answer is 'no'. That sort of issue, which the 'time' question falls under, is a Pragmatic solution.

If you can't DECIDE, see the Existentialism thread..