Scientifically speaking that is the same thing. Unless you have evidence that it works, it is reasonable to say it doesn't.First two have yet to be proven.
...
Neither said masks don't work. They did say that based on early evidence they weren't needed outside of those caring for patients. As they got more evidence they realized covid is contagious enough that they will help.Fauci and Tam both said at the beginning that mask don't work even though Fauci was advised that they do