I'm just confused now. I explained in my last post about how EVEN IF every single manufacturer is straight up lying, even by saying their devices will cure your cancer - that does nothing for dCS's situation about false advertising. Would you want this formally explained as to why because I'm not getting the feeling that you appreciate the concept I'm talking about.
As for "splitting hairs", it's not splitting any hairs, I took all four of your examples and explained why none of them necessarily reference an objectively verifiable claim, while dCS's claim does. It's not the same level of "bullshit" for reasons explained, but if you disagree with any of the four examples (that you yourself brought up as examples - not me) and the distinctions I drew for differentiation between those four and dCS's, you're welcome to say which, and why.
As for them having to say "unrivaled SINAD", that would be less of an affront, because they actually make the stronger claim where they say unrivaled technical performance. SINAD is only one aspect of technical evaluation of sonic aspects. So in reality, my point would be weaker than it currently is, because they say they're unrivaled in technical performance in general, meaning more than a single metric. Which is obviously false, they aren't unrivaled in multiple technical performance aspects - they're actually inferior on simple things like channel balance for example from a technical perspective.
But lets assume the most charitable interpretation of their claim, and they're referencing two technical performances they are unrivaled in (and not they they're technically unrivaled in them all or many). Which two aspects are they technically unrivaled in considering this is an advertisement for a DAC. Please lets not be childish and say "well uhh maybe it's technically unrivaled with how well it can crack a skull technically speaking HUR HUR you never know what they're talking about right??". If a DAC is being sold, it only makes sense the advertising is referencing technical and sonic performance of what/how a DAC functions as. And not the "technical sonic performance of the pleasing sound of someone's head being cracked open" or other stupidity people like to get smart with when getting in the weeds about false advertising claims..