Let's backtrack to Mike Stone's original claim, which you quoted in
post #336 and is at the top of the nested quotes above, followed by your criticism in red. To whit:
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This method, still used by virologists today, asserts “viral” presence based on lab-created, artificial effects observed in cultures of human and animal cells.
**
The quote was from the following article:
How a speculative agent with no direct evidence was framed as a causative "virus."
mikestone.substack.com
In the original text, part of the text is hyperlinked, as it is above. The hyperlink goes to another of his articles, this one:
Reflections of a Failed Pseudoscientific Hypothesis Science is the systematic study of the natural world. As outlined in Chapter 2 of Environmental Science, its fundamental goal is “to underst…
viroliegy.com
In that article, Mr. Stone quotes studies from 1997 and 1999, though his main focus is "Vlail Petrovich Kaznacheev—
one of Russia’s leading medical scientists and founder of key research institutes"
Anyway, my point is that the article provides plenty of evidence that the foundation of virology rests on this method. I admit that I don't know how often this method is used today, but I strongly suspect that without this method, no other method would work, as you need to start somewhere with the databases of alleged viruses and this appears to be the starting point.