[zer0w1re]

I always thought that's what captchas evolved into anyways. Human-reinforced training for AI image recognition.

[HankB99]

That seems to square with the content I'm frequently tested in. Crosswalks and traffic signs for self driving cars and stairs for walking robots.

I've also noticed that captchas are getting more difficult. Is that because the AI needs to sharpen recognition skills or because that's needed for differentiating human from 'bot?