I don't understand this. When I get the "I am not a Robot" box, in 95% percent of all cases I only have to click the checkmark. That's it. A robot certainly can

I don't understand this. When I get the "I am not a Robot" box, in 95% percent of all cases I only have to click the checkmark. That's it. A robot certainly can do that, too. In the remaining 5% I get a Captcha that is impossible to solve, e.g. it states "Please mark all cars" and once I've marked all cars it states "Please also mark all traffic signs" and when I've marked all traffic signs it states "Please also mark the following traffic signs" and so on, for as long as I bother to try. I have never encountered a Google Chaptcha that worked in any other way, either it works trivially with one click or never. My conclusion has always been that Google Captcha are simply broken for anyone who runs an ad-blocker, and I don't don't bother with services for which it doesn't work. Problem solved.