What if gravity is like centrifugal force?

JDN 2456392 EDT 11:55.

 

I was thinking today about centrifugal force, and how to decide whether it really qualifies as a real force, rather than an artifact of a bad reference frame. What does it mean to say that a force "really exists", and how could we tell?

Well, I came to the conclusion that it really isn't a real force, because there's no mechanism for it to happen, no virtual particles exchanged. Also, it's always directly proportional to your inertial mass, which is pretty darn f...