So I'm facing the said sentence in the following quote:
Dear cat, your ears are flipped inside out, so I know you’re not listening to a word I’m not saying.
So I'm wondering whether the double negation is implying litotes or intensification here. I believe it would be the latter, but I'm not so sure due to the complex usage of double negation in English.
The quote comes from the book "99 Cents For Some Nonsense", also appearing in the book "How to Argue With a Cat", both of which written by professional native writers. A (yet another native) translator is mentioned for the first book, but the source and target languages aren't so clear.