Retired geoscientist. 🪨💦⚒️🧭🗺️📈. Mineral exploration. Investigation and remediation of contaminated soil/water/sediment. PhD in hydrogeology.
@emilyakopp Ebola at BSL-2.
The specific claims in Worobey et al:
Adjusting the bandwidth parameter to more realistic values shifts the center of the KDE pattern away from the Huanan market, to an neighbourhood north of the market where there truly is a significant cluster of case-residences. 
...although the KDEs for all-cases and unlinked-cases were prominently displayed on Fig. 1, and featured in various tweets emitted by the authors. 
The graph is dominated by the Jan-Dec peak, which effectively and conveniently scales down the current persistent high levels. The eye tends not to catch that the levels post-peak are much higher than the levels before. (2/n) 
This was reported in Saanich News (via CP?), but they say the absences were “due to COVID-19”, which is not quite what Dix said.
Due to these errors, the preprint does not support its claim of dispositive evidence for emergence of SARS-COV-2 via life wildlife trade, or its claim that the Huanan market is the unambiguous “epicenter” of the COVID-19 pandemic. 
@MichaelWorobey @acritschristoph @K_G_Andersen @stuartjdneil @edwardcholmes @arambaut @carlzimmer @PeaseRoland @amymaxmen
@MichaelWorobey @acritschristoph @K_G_Andersen @stuartjdneil @edwardcholmes @arambaut @carlzimmer @PeaseRoland @amymaxmen 
This simplified image is important because it is used to lead the various Twitter threads that have been put out by the authors, and was featured in a New York Times article. Taken alone, it is a convincing graphic.
2. This thread mainly consists of responses that I made to this tweet from @MichaelWorobey, gathered together and revised as a thread so as to form a coherent sequential discussion.
