It almost sounds like you’re living with absolute certainty that we know everything there is to know.
It is worse than that. He insists that he knows all there is to know:
I know, as much as it can be known that basic cables are audibly transparent ... I know as much as something can be known that power cords make no actual difference ...
It’s not possible to have a real conversation with someone who believes they know it all.
EDIT - And then look at what he just claims literally in the post below:
I never claimed to be any kind of expert either.
He’s a troll, folks.