[DiogenesKynikos]

That definition exists because nearly all virology involves modification of viruses. You have to have a definition of what type of research is concerning, or else it's just up to whatever some showboating congressman and his ignorant followers think. There was an entire, highly public, year-long process in the 2010s to define what "gain of function" should mean for the purpose of US-government-funded research. That's the definition Fauci uses.

> It was his professional duty to add to his answer that the gain of function they funded in Wuhan that the Congress was asking him about isn't fitting whatever narrow technical definition NIH uses.

No, it isn't. You would think a Senator in charge of regulating the NIH would ask one of his aides to explain to him before the session what "gain of function" means.