We need a word where you can answer yes to a negatively phrased question.
“Aren’t you going?”
“Yes, I am not going.” or “No, I am going.” or “Yes, I am going.” Gets confusing.
But I also think English would be a richer language if we had some less specific ways of phrasing things, more all-encompassing terms, more ways of looking at the overall picture of something, instead of adding a multitude of very specific vocabulary words. We have, for example, a few dozen words for various types of bread but not a single word that encompasses the essence of breadness or the core, fundamental notion of breaditude. English is a very specific and technical language, or so it seems to me; but because it is, we frequently get tangled up over terms because we argue over the degree of precision required. The specificity of our language does not prepare our minds to accept concepts like breaditude or chair-ativity. So more words like Zeitgeist, please.
FISH