Too much Bayesian statistics, which to my untrained eye look like they would inevitably be biased against a lab leak outcome. Here is my personal experience: I contracted Covid from a colleague at work who did not know yet that he was sick, in June 2020. As most people were working from home, there were only three of us in the office, all practicing social distancing. His closest contact with me was talking to me, from a distance of two meters, for about a minute, and I got infected. He was not coughing, and there was no physical contact (we were all carefully sterilizing our hands every now and then, and not touching our faces). So the virus spread from him to me by the simple act of talking, across a distance of two meters. Even the flu virus, which has been with us for thousands of years, is normally not this infectious. Yet we are being told to believe that the Covid virus jumped across a species, and also achieved this ferocious infectivity, through some random mutations, right from day one!