On Tue, 3 Aug 2004 15:12:34 +0100, Richard Davey <rich at launchcode.co.uk> wrote: > There is another way - instead of scrambling a code and telling the > user to "type in what you see" - you could show a picture, of say 3 > rabbits and say "how many rabbits do you see?". The user types in 3 > (obviously!). > > It's a simple example, but you can see the subtle difference. No > script could ever accurately determine what is or isn't a rabbit in a > photo. Very nice idea. However, I wonder if it would be trivial to determine how many times a given pattern displays in an image. What I mean is, the task you describe does not require that the machine be able to determine that there are three rabbits, only that there are three of something. Machines are pretty good at doing this. I almost think it would be better to show a single rabbit (or whatever) and ask what it is. But then you'd have to accept 'rabbit', 'bunny', and every other flavor. Thanks, -- Matt Warden Berry Neuroscience Lab Department of Psychology Miami University This email proudly and graciously contributes to entropy.