Early virologists openly admitted that “viruses” were an enigma and that their “virus preparations” were mostly contaminated host cell material. Instead of proving the “virus” was there, they simply assumed it was. The entire field rests on that methodological leap.

Without first purifying and isolating the alleged “viral” particles, there is no way to determine whether the observed material is “viral” or simply host-derived debris. Labeling it “virus” from the outset assumes the very conclusion that must be proven—a textbook case of begging the question.

If the conclusion has to be assumed before the experiment begins, it isn’t being tested—it’s being presupposed.

Source: https://pubmed.ncbi.nlm.nih.gov/20267518

For more on virology’s inability to purify and isolate their “viruses.”

https://viroliegy.com/resources?category=purification-isolation