In 2002, having spent more than three years in one residence for the first time in my life, I got called for jury duty. I show up on time, ready to serve. When we get to the voir dire, the lawyer says to me, āI see youāre an astrophysicist. Whatās that?ā I answer, āAstrophysics is the laws of physics, applied to the universeāthe Big Bang, black holes, that sort of thing.ā Then he asks, āWhat do you teach at Princeton?ā and I say, āI teach a class on the evaluation of evidence and the relative unreliability of eyewitness testimony.ā Five minutes later, Iām on the street. A few years later, jury duty again. The judge states that the defendant is charged with possession of 1,700 milligrams of cocaine. It was found on his body, he was arrested, and he is now on trial. This time, after the Q&A is over, the judge asks us whether there are any questions weād like to ask the court, and I say, āYes, Your Honor. Why did you say he was in possession of 1,700 milligrams of cocaine? That equals 1.7 grams. The āthousandā cancels with the āmilli-ā and you get 1.7 grams, which is less than the weight of a dime.ā Again Iām out on the street.