Crazy Eddie - good job. This puzzle was designed to illustrate the differences in thinking between right brain and left brain processes. Using right brain thinking, you visualize a man starting at the bottom of the hill and another simultaneously starting at the top, and you quickly see that they must pass. A left brain thinker sometimes gets bogged down in verbal arguments, instantaneous snapshots, rates, etc. He cannot accept the simultaneous picture and has to somehow prove it with a linear prjection of the two trips. You got the correct answer with what appears to be a combination of both.

I had never thought about "two" instances of being at the same place at the same time (or time of day). I probably was not clear in the question...I really couldn't remember the exact riddle.