On Mon, Mar 3, 2014 at 6:05 AM, Happy Melon happy.melon.wiki@gmail.comwrote:
But putting out nine pictures of humans and one picture of a cat and asking for the "odd one out" is no easier to misinterpret than a squiggle that might be a G or might be a 6.
It seems to me that putting nine pictures of humans and one picture of a cat is probably not much harder of a computer vision task than trying to determine which letter a particular squiggle corresponds to, either. (And that's leaving aside the fact that an 10% success rate for random guessing seems pretty bad for a captcha.)
So naturally I thought that the real captchas would have a subtler level of intended oddness, so that the possibility for unintended oddness to confuse people would be greater.