In the looking-glass world of Australia’s national broadcaster, a journalist claimed this week that there is ‘no evidence’ the Covid-19 virus leaked from a lab in Wuhan. In reality, there is even less evidence that it spontaneously evolved in a species sold in the Huanan seafood market. In its absence, Ockam’s Razor — a concept the ABC ought to understand, since it has a program named after it — suggests that a lab is the most likely origin of the virus.