We cannot explain everything. We know more about what something is not than what something is. If there would have been no word for colour blue, it would still have existed in reality. It would only have been absent in linguistics. But since we don’t have a word for it, we couldn’t define or comprehend it. But we still could say what it is not. It is not orange. It’s not an elephant, etc. This method of knowledge is truer and more rigorous than positive knowledge.
— Nassim Nicholas Taleb