The contradiction, from Latin versus di-dire, to say against it, is always a relational fact between two opposing thoughts or languages, never between two realities, because, as the stoogy Master said : Nothing can be and not be at once under the same aspect. But when we talk about metalogical contradiction, it is an apparent contradiction between two languages that belong to different levels, as when I say: "I always lie". I don't really contradict myself because, in saying this, I can't also refer to the quoted proposition. As Wittgenstein said, no language is self-described. To do so you would have to build another language, which would already be metalanguage.
