> This kind of questioning is notoriously difficult. For those people unfortunately old enough to remember (like me) its the Turing Test. And it *is* notoriously difficult. If I were a spammer/hacker with the aim of getting past these things (which I'm not) I might even find the images technique annoying enough to build in some image recognition alogorithms to my robot - I suspect these techniques are quite good these days. I guess the only really solid way to do this is with bypass codes. Some kind of randomly changing pattern could be effective but there would be an intelligence threshhold for that and some people would be excluded. Andy -- andy _______________________________________________ Andy Heath Sheffield Hallam University andy@andyheath.org.ukReceived on Monday, 20 October 2003 02:34:30 GMT
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