...Then you select it, and the Captcha fails.

https://lemm.ee/post/13472844

...Then you select it, and the Captcha fails. - lemm.ee

They do that on purpose, as an AI/Bot wouldn’t hesitate.

Sometimes I’ll be stuck on a captcha because I’m answering too fast, so I’ll wait a delay then hit the answer and suddenly it stops going in circles

I thought the reason is they want to see the limits of what a human considers qualify as answer to their question in order to better train their AI?
I mean it could absolutely be both. There’s assumedly a lot that goes into these algorithms and most of it we will never know for sure, just make educated speculation lol