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Or how about short stories, something like; "Brian came home very late. He couldn't find Mr. Hat. While he was thinking where his cat might be, he noticed the w

Or how about short stories, something like; "Brian came home very late. He couldn't find Mr. Hat. While he was thinking where his cat might be, he noticed the window was wide opened." What's the name of the cat? I don't know if it's hard or easy to guess it algorithmically.

kalleboo 14y ago
The problem is generating enough unique questions. If you only have 10 questions, they can just hard-code them. That was the problem with all the "kitten captchas" etc. Very limited image database.