@deorsum There's backstory. On a Web forum someone made the claim that there is literally no such thing as a dissonant interval, and when I commented that such intervals won't stop existing just because he said so, he threw a tantrum. Responding there would be inadvisable since the guy turns out to be a mod, so I'm venting here.
I'm well aware that there are subtleties to the matter - which make the joke funnier - but simply denying any meaningfulness of the entire concept seems excessive.