What is the noun for 'self-evident' or 'obvious'?

I am looking for a noun to describe something that is self-evident. I don't think I can say 'this is a self-evidency', but searching online and on this forum, I haven't found a proper alternative yet.


Given, as in "The fact that .... is a given".


I think given is the closest to what you described, but presupposition and tautology come to mind.


Obvious can itself be a noun. You can speak of ‘stating the obvious’, for example. But it’s not a countable noun, so you can’t precede it with the indefinite article.


According to Wiktionary, self-evidency is such a noun.