system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:If I put a giant fan on my sailboat, would I be able to sail as though there were wind, even in the absence of wind?

I have always wondered this. Maybe it's simple.  Imagine the fan was big enough to fill the sail, but was attached to my boat.
gpt
While common sense says "No", newton's third law and all that, Mythbusters have actually proven that it DOES work due to some clever physics. Its similar to how old ships used to sail against the wind and all that.