[thayne]

But a traditional captcha doesn't solve that either. Even if the captcha really is too hard for a bot, you can pay other humans to solve captchas for you at a click farm. Or even just generate content and automate everything except the captcha, and solve those yourself.

[Dylan16807]

A dead comment thinks you're making a no true Scotsman argument, but you're right. The key is that the workarounds you're listing are very cheap and easy, not just possible.