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Bots are better than humans at cracking ‘Are you a robot?’ Captcha tests, study finds
(www.independent.co.uk)
This is a most excellent place for technology news and articles.
I'm convinced many of them fail you on purpose so they do multiples of them. Increasing the amount of training per user.
My favorites are the ones i used to get on dread, jesus christ i've never sworn so much trying to do something so simple, it was ridiculous.