For an observer to perceive an entity, he or she must be capable of distinguishing it from the succession of impressions preceding and following it; in order to grasp those impressions as pertaining to the same entity, however, the same observer must be able to take them as a unity despite the differences that succession implies. This ineluctable fact of observation underlies the paradoxes of motion, the antinomies, and the uncertainty principle. For in all cases, some minimum of motion, distance or velocity — namely, change over time — is required for any observation to take place, even as the observer posits an unchanged point or particle as being subject to that change. At the level of normal, physical sensation, the fact that these necessary elements of observation exclude one another passes unnoticed. It is only at the highly focused, granular level of quantum physics or in the extreme situations of philosophical fictions that this mutual exclusivity emerges.

more from William Egginton at The Opinionater here.