[salawat]

As I recall this article by Nicholas Wade goes into why the Furin cleavage site is a strong signal of potential active engineering in the GoF vein.

https://nicholaswade.medium.com/origin-of-covid-following-th...

As addition of a Furin cleavage site is an old hat acknowledged technique for increasing human infectivity of a virus. The issue with a zoonotic origin though, is that the odds of a mutation is incredibly small, and a recombination at that site would require the sequence to exist in another coronavirus, which has not been discovered to date.

It is also known WIV researchers had recieved instruction from another virologist on "no-see-um" editing techniques that would not leave traces of the mechanism used to splice in an edit.

So not proof, but the network of coincidence is as hard to ignore as a spinal tap amp duct taped to your head, cranked to 11, playing the 1812 Overture.

[shlant]

for anyone interested in more information about this commonly parroted "smoking gun" (Furin cleavage site):

https://twitter.com/K_G_Andersen/status/1391507230848032772