It only makes sense that arguments are only necessary when genuine reasons to doubt exist. That which is most obvious then, requires no argument and no other consideration at all in order to be justly believed. It should have by now in so many thousands of years become clear that evidence is inversely related to argumentation.
It is true that doctoral theses merely present old evidence, rearranged, but defending a thesis always entails to providing more of one and less of the other. So at the core, foundational level of belief are brute facts which are so obvious that we can only think to suggest they aren’t so. Antithetical claims of them must be justified before we doubt them. Frankly, whatever speaks for itself should be allowed to, until we’ve found it to be a liar.
This leaves Foundationalists and Presuppositionalists frustrated in the demand that because we can doubt, say, existence, that we aren’t entitled to say we know we exist; that it’s merely supposed. Quite wrongly, no, we need not suppose at all. One only supposes we should doubt simply for the sake of doubting.
For what it’s worth though, almost nothing speaks for itself. However, this is the most straightforward way to explain why we can be justified in holding some beliefs without any literal reason (ie from consideration and deliberation) or evidence outside of what most obviously meets the eye.
Just a thought.