> "There is no evidence that shows Covid-19 leaked from a laboratory." But this, too, is complicated, because despite what people say on Twitter, as humans we

> "There is no evidence that shows Covid-19 leaked from a laboratory." But this, too, is complicated, because despite what people say on Twitter, as humans we actually can reason from first principles, assign probabilities, and discount or promote less or more likely explanations -- especially when hard evidence isn't forthcoming. When there's "no evidence" for something, that doesn't mean all explanations are equally likely.