Covid was assumed to originate in Wuhan China in late 2019. This assumption was quickly converted into a Rule that was programmed by likely billions of individuals into their own Subconscious.
Assumptions are guesses based on little information and and little understanding. While an assumption is still an assumption an individual can then add more information and understanding to it. If however an individual converts the initial assumption into a Subconscious Rule, no more information will be considered as relevant because it may conflict with the Rule. The only possibilities that are then considered are those that support the Rule.

The Wuhan Rule would not consider a version where Covid originated with a cross species infection around Belgium in 2014-15. The virus had a tough time of it in the first few years being mildly transmissible and totally asymptomatic. It did however continually adapt to its new hosts. It finally got its big break when it was imported into Wuhan and mutated into the Covid19 virus and the rest is history. Like to come up with another version that will conflict with the Wuhan Rule.

Subconscious Rules limit what you see and what you think.