On Thu, 16 May 2002, John Cowan wrote: > Invent Yourself scripsit: > > > x1 is the parallax of x2 as seen by x3 who moves to x4 from x5 > > I don't understand what x3 has to do with it, frankly. I can talk about > the parallax of an object on the opposite wall from one side of a room > vs. the other side, without postulating an observer who actually moves > across the room. zo'oru'e ju'oske naldrani