Oh jeez, the whole "is urine sterile" debate. Enter on one side, the purists: "sterile means absolutely, positively no germs" Enter on the other side, the rea

Oh jeez, the whole "is urine sterile" debate. Enter on one side, the purists: "sterile means absolutely, positively no germs" Enter on the other side, the realists: "if I pull open my festering sore, and you piss on it, will I get your illness?" The purists say, "well maybe, the probability is not zero, you can't say that is sterile" The realists say, "Run the experiment it 1000 times, and if no one gets infected, what do you call that? What do you call it if 1 out of 1000 gets infected?" What do you say?