***ERROR***ERROR***DANGER WILL ROBINSON***DANGER***<br /><br />The specific explanation gave by Daniel Jackson (as played by James Spader) was that, to travel in any three dimensional space, 7 co-ordinates were needed. He then proceeded to draw a 2-D representation of a cube on the whiteboard, drawing 6 points on the cube, one in the exact center of each side of the cube. He then connected these six dots, each to the one diametrically opposite to it (note the three axes formed by this). Then, to illustrated motion through the gate, Jackson draws a line from the center of the cube out to an origin point and claims that the origin is the seventh coordinate.<br /><br />Bull!! Even if they were using a single symbol for Terra, that symbol <i>incorporates the 3-coordinate system I described in my earlier post</i>. Further, if you incorporate the time factor, no single symbol could <i>possibly</i> describe any origin because there is no universal referent for time, and any single symbol used would necessarily be locked into the point at which the Stargate became operational. Otherwise, they'd have a clock on the bloody thing.