system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How does clicking the "I'm not a robot" reCAPTCHA box confirm that I'm human?

Couldn't a spam program automatically click the box to bypass this?
gpt
reCAPTCHA takes account of a whole lot of information about how your cursor moves before you ever click that box.  If it looks like something a spam program might do, it throws up an extra challenge, like identifying features in images, that humans are still much better at than bots.  Things that can set it off include "teleporting" the cursor to the right location, moving it in perfectly straight lines, and similar.