Time refuses to be simplified and reduced. You cannot say that it is found only in the mind or only in the universe, that it runs only in one direction, or in every one imaginable. That it exists only in biological substructure, or is only a social convention. That it is only individual or only collective, only cyclic, only linear, relative, absolute, determined, universal or only local, only indeterminate, illusory, totally true, immeasurable, measurable, explicable, or unapproachable. It is all of these things.