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by londons_explore 1566 days ago
> reCAPTCHA actually enters an endless selection where it's impossible to pass

I believe this is because from the same IP address there are other users who are failing the recaptcha. So in between you starting, and clicking 'submit', there are a bunch of other wrong-answer recaptchas, so, when combined with your correct answer, it looks like you got it correct just by chance, not by being a human.

1 comments

This might be true for massive sites (eg Google) but smaller sites only if the cdn aggregates traffic to many different sites.
recaptchas logic to check if someone is a bot or not is global and run on googles servers, not site specific.