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That would certainly be the most likely kind of lab-based hypothesis. Especially considering the overt flouting of rules people engage in for other kinds of animal research, in the rush to compete for results and publications.

But it would still result in heads rolling and a constant stream of embarrassing revelations. Consider the Fukushima investigation. Every revelation of bad process and ignored warnings is another news cycle with everyone outraged at them. "Bad luck" is something you are not forgiven for if there's any negligence to point at.