If those bothersome CAPTCHA prompts online seem to be getting ... “Is it just me, or have those ‘I am not a robot’ tests started getting harder?” British comic Jack Whitehall quipped ...

You know the drill: prove you’re not a robot ... seemingly innocent CAPTCHA is actually a devious little trojan horse that’s been spreading faster than a Reddit meme. And the worst part?

But have you ever asked yourself whether a robot or an AI could also pass these tests? How does the CAPTCHA know that it was filled in by a human? And what does the term even stand for?