Leif K-Brooks <[EMAIL PROTECTED]> writes: > Steven D'Aprano wrote: > > For a text only solution, consider putting up a natural language > > question such as: > > > > What is the third letter of 'national'? > > What is four plus two? > > How many eggs in a dozen? > > Fill in the blank: Mary had a little ____ its fleece was white as snow. > > Cat, Dog, Apple, Bird. One of those words is a fruit. Which one? > > That wouldn't work as a true CAPTCHA (Completely Automated *Public* > Turing test to tell Computers and Humans Apart), since making the > list of questions and answers public would defeat its purpose.
The "Public" part of a CAPTCHA is the algorithm. The data consumed and produced by the algorithm don't need to be publicly correlated -- and indeed shouldn't be, for exactly the reason you state. -- \ "To me, boxing is like a ballet, except there's no music, no | `\ choreography, and the dancers hit each other." -- Jack Handey | _o__) | Ben Finney -- http://mail.python.org/mailman/listinfo/python-list
