 The way a scientist talks is they say, here's my hypothesis, here's what would destroy my hypothesis. Because what you want to do is try to destroy your hypothesis, and then you can change it or go on to something else. I mean, proving a hypothesis is much, much harder than destroying one. So if it began in the market, the cases in the market began on December 10th. Ergo, the way to kill that hypothesis is to find evidence of it circulating in the world before December 1st.