The word for today is…
axiomatic (adj) – Of, relating to, or resembling an axiom; self-evident.
Source : The Free Dictionary
Etymology : An axiom is a principle widely accepted on the basis of its intrinsic merit, or one regarded as self-evidently true. A statement that is axiomatic, therefore, is one against which few people would argue. Axiomatic entered English from Middle Greek axi?matikos, and axiom derived, via Latin, from Greek axi?ma (“something worthy”) and axios (“worthy”). The word axiom can also refer to a statement accepted as true as the basis for argument or inference. Such axioms are often employed in discussions of philosophy, as well as in mathematics and geometry, where they are sometimes called postulates.