CAPTCHAsOnly the internet asks its users to prove that they are human. CAPTCHAs, the word recognition puzzles designed to prevent robots from accessing protected websites, may be a necessary evil but even their inventor has said that he regrets their drain on human time. Assuming that each one takes ten seconds to solve, it has been estimated that we waste 150,000 hours a day squinting at distorted letters. Anecdotal evidence also suggests that CAPTCHAs are getting harder, with some effectively indecipherable.
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