FROM NOW ON, I shall evaluate the loyalty of my friends based on whether they would back me up in a knife fight. This includes the girls. This is how it works. If this friend and I were, say, stuck on a prison planet and one of the other inmates started picking on me to the point where shivs were drawn and ready, would this so-called friend stand with me and make sure I didn’t get jumped from behind? (Friend.) Or would he/she skulk in the shadows and pretend not to know me? (Not friend.) It’s just something that occurred to me. And, I think, it’s the only way to be sure.