Presumed without analysis.
Self-evident, intuitively obvious.
Based on hypothesis and theory rather than experiment or empirical evidence.
Developed entirely from scratch, without deriving it from existing languages.
In a way based on theoretical deduction rather than empirical observation.
Held as true or valid without evidence.
Originally, being arms which a person had a right to assume, in consequence of an exploit; now, those assumed without sanction of the Heralds' College.
Forward or presumptuous.