In math stackexchange, I'm sometimes asked to verify if I'm human.

But actually it does not work since when I get the captcha actually I don't need to fill it. I just have to close the window and just click again on the button I clicked on.

Does someone know if it's a known bug?

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    $\begingroup$ How can we know that you're actually human, though? Did you cry at the end of Jurassic Bark? (Before Bender's Big Score ruined it) $\endgroup$ – Asaf Karagila Jan 1 at 17:57
  • $\begingroup$ i don't understand. maybe you didn't understand my question so I edited to be clearer. $\endgroup$ – math Jan 1 at 17:59
  • $\begingroup$ It was a joke. In part, a reference to xkcd.com/233 (specifically, the tooltip there) $\endgroup$ – Asaf Karagila Jan 1 at 18:00
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    $\begingroup$ Ah! Ok. I didn't get the joke. Thank you. But actually robots are not taking the decision to make posts on their own, so their owner would just have to remark what i've remarked. $\endgroup$ – math Jan 1 at 18:02
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    $\begingroup$ Strange. In eight years on MSE, I have never been asked to confirm I am human. $\endgroup$ – Jean-Claude Arbaut Jan 2 at 0:06
  • $\begingroup$ @Jean-ClaudeArbaut I remember a thread on primary meta where the dev enabled captcha for unregistered users (very recently, due to a disruption caused by them).--> dunno if it has been lifted meta.stackexchange.com/q/355670 $\endgroup$ – Anindya Prithvi Jan 3 at 5:57
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    $\begingroup$ @Jean-ClaudeArbaut For me, it asks about me being human any time I paste in things without remembering to manually type a "........................" in the same window. For long answers, I try to write the Latex in a things.tex file I keep on my home computer. Also, I may paste in computer output. Seems fair to think the site is reacting to a post done all at once, without extra fiddling steps that a human would be likely to use. $\endgroup$ – Will Jagy Jan 4 at 18:11
  • $\begingroup$ It is true, that CAPTCHA allows (almost?) any action as proof that I am human. So the question "is it a bug?" really means "does it stop automated spam?" Your evidence does not answer that question. $\endgroup$ – GEdgar Jan 9 at 14:34

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