Can You Write a Sure-fire Algorithm to Stop Bots?

[Shoe Lace]

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Not sure if I understand your point. With current voice recognition software and voice emulation you could have software answer these questions correctly.

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Maybe when you create an account you have to activate it by phone. During this phone conversation you'll be asked to speak a few random sentences by the rep.

They'll log your voice pattern, and if the random math answers aren't the same pattern as your original activation pattern then your account gets disabled.

Seems like a bit much, but until we get some type of keyboard that can verify finger prints on the fly and send them over a network I really can't see how they can stop bots.

I'm sure when this technology comes there will be a way around it though.