Imagine having a party with the ten people randomly listed on your Facebook profile page. Would it even be possible? Are they in the same state? Do they know each other?

Mine right now are David G., Carrie, Courtney, Chelsey, Bequi, Lindsey, Kimberly, Casey, Michael C., and Ali. Bequi only knows Lindsey, Ali, and maybe Carrie. Casey and Courney are the only couple. Chelsey and David would have to fly here from New York. I’ve known Carrie the longest, and I suspect she knows more of the others than anyone else.

I refreshed my profile page, and the same ten people showed up, but in a different order. How the heck does Facebook calculate whom to show?