Brendy, that was (almost) one of Xeno's paradoxes. Actually, the paradox is that to get from A to B, the arrow first has to travel half of the distance; and to travel half the distance it first has to travel a quarter of the distance; and so on. Xeno's point was that if there is a minimum "quantum" of time in which something can happen, then the arrow can never reach its target because there is an infinity of steps.

A good testbed for this is the electric guitar. Guitars are fretted so you're (mostly) guaranteed an accurate note, and alternate-picking gives you discrete notes. And by a happy coincidence there are people who've dedicated their lives to learning how to alternate-pick at truly ridiculous speeds. If you hit Youtube and search for guitar lessons, you should find some guy with a series of short tutorials playing scales at a speed where the notes *do* start to sound like a continuous slide, at least to my ears.

Graham.