On Wed, November 18, 2009 16:03, Lea Murphy wrote: > These questions make my head spin. The lamp one is weirdly difficult; it made my head spin around a few times, checking and double-checking because I was having trouble being sure I had the logic down. The final form of my answer is nothing like how I figured it out, but it's how I convinced myself I was right and is much easier to explain :-). -- David Dyer-Bennet, dd-b@xxxxxxxx; http://dd-b.net/ Snapshots: http://dd-b.net/dd-b/SnapshotAlbum/data/ Photos: http://dd-b.net/photography/gallery/ Dragaera: http://dragaera.info
