The phrase "authoritative assumption" is correct and usable in written English.
It can be used when discussing a belief or conclusion that is accepted as true based on authority or expertise.
Example: "The scientist's authoritative assumption about climate change was based on years of research and data analysis."
Alternatives: "definitive presumption" or "assertive inference".
Since the form ultimate concern takes, the texts regarded as authoritative, and the metaphysical assumptions and evaluations inextricably bound up with these forms and texts vary from one religious community to another, it is hardly surprising that conceptions of maximal greatness vary as well.
In practice, a religious community's conception of the divine is largely determined by its conviction that the object of its devotion is maximally great, by the spoken or oral texts it regards as authoritative, and by metaphysical assumptions and valuations widely shared by the community's members.
One authoritative group, using worst-case assumptions, estimated that a plane spreading anthrax over a big city might kill 100,000 people.
But of course even this is a particular worldview and reflects certain implicit or explicit assumptions about what data sources are authoritative.
So I sort of made the assumption that she was quite bossy, she was authoritative, she was confident and she had a sense of humor.
(b) Relational integration i.e. whether the new working practice embodies what clinicians personally regard as valid (clinical) knowledge, as appropriate expertise, and the appropriate sources of that expertise; and how far the new working practice conforms to existing public assumptions about what knowledge is credible, useful and authoritative.
While the parties to these debates use many of the standard tools and techniques of philosophy, they were still circumscribed by the assumption that the Buddha's views on the matter at hand are authoritative.
Key terms are poorly defined, auxiliary assumptions abound, and the literature I'm familiar with that is cited as authoritative is, well, not good.
They all wander around in a labyrinth of ignorance and error and conjecture, in which truth is intermingled with fiction at a hundred points, in which unjustified assumptions have attained the validity of premises, and in which there is no recognized and authoritative theory to hold on to.'.
Authoritative eugenics programs, in contrast, were coercive state programs designed to promote social goods, and were based on problematic assumptions about hereditability.
