I recently got a terse note explaining to me there is no such thing as a shielded power cable despite my saying there is.
How dare I claim such a thing exists? It's an audio myth.
To seal the question, the author added their credentials as an electrical expert that deals in this kind of technology on a daily basis.
Aside from being completely inaccurate, as virtually every IEC aftermarket power cable is, in fact, shielded, the clincher for me was the proclamation of expert status at the end of the note.
We believe that adding a qualifier for our knowledge helps solidify the statement of fact. I suppose that can work. "The entry you made on your tax form is wrong" carries a lot more weight when it comes from your accountant than the fellow bagging your groceries at the market.
Unless they are wrong.
Claiming expert status and then being wrong has its pitfalls. Someone making the same mistakes for years while generating an income from those errors tends to get so invested that their only emotional recourse is to dig even deeper into the inaccuracies.
That's how myths form.
You may not be an expert, but how many audio myths are you invested in that may not actually be true? I can certainly own up to a few.
Myths reflect the worldview and moral values of the culture that created them, not necessarily the facts.
It can be daunting to separate fact from fiction, myth from truth, but it can also be helpful to know the difference.