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Originally Posted by ScottyDM True, except something like a geography test would exclude about 75% of Americans under 40 years of age (being over 40, I can say that).  
Scotty |
Heyhey, thats what Google is here for
Come on, people aren't so lazy, to not even make as little effort as that
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Originally Posted by ScottyDM How do you broaden the test so you can include these groups of humans, while excluding machines? |
That backwards thing is not a bad idea... or even, the instructions on how it should be read could be randomized and imprinted on the captcha itself, next to the word - that will most surely confuse any type of bot.