IT'S AN ILLUSION
'(Jon of the Clue Crew shows another illusion on the monitor.)  You think the two green vertical <a href="http://www.j-archive.com/media/2006-07-13_DJ_14.jpg" target="_blank">lines</a> are different lengths, but they're <a href="http://www.j-archive.com/media/2006-07-13_DJ_14a.jpg" target="_blank">not</a>--it's the illusion of depth created by the horizontal lines doing this, from the Latin for "inclined together"'
converge