Does anyone know how Facebook works? Or, more precisely, how it can be that today it recommended Gio to me as a possible “friend”? I have never met Gio. I am not “friends” with anyone on this blog. I am not aware of traveling in any circles in common with Gio. She and I disagree about every movie ever made. And yet Facebook has somehow ferreted out this slim connection. I recently re-watched Enemy of the State and nothing the CIA could do in that movie comes close to this kind of deep knowledge produced by some software algorithm.