dogmatize, lay down the law. 
     Adj. certain, sure, assured &c. v.; solid, well-founded.
     unqualified, absolute, positive, determinate, definite, clear,
unequivocal, categorical, unmistakable, decisive, decided, ascertained.
     inevitable, unavoidable, avoidless[obs3]; ineluctable.
     unerring, infallible; unchangeable &c. 150; to be depended on,
trustworthy, reliable, bound.
     unimpeachable, undeniable, unquestionable; indisputable,
incontestable, incontrovertible, indubitable; irrefutable &c. (proven) 478; conclusive, without power of appeal.
     indubious[obs3]; without doubt, beyond a doubt, without a shade or
shadow of doubt, without question, beyond question; past dispute; clear as day; beyond all question, beyond all dispute; undoubted, uncontested, unquestioned, undisputed; questionless[obs3], doubtless.
     authoritative, authentic, official.
     sure as fate, sure as death and taxes, sure as a gun.
     evident, self-evident, axiomatic; clear, clear as day, clear as the
sun at noonday. 
     Adv. certainly &c. adj.; for certain, certes[Lat], sure, no doubt,
doubtless, and no mistake, flagrante delicto[Lat], sure enough, to be sure, of course, as a matter of course, a coup sur, to a certainty; in truth &c. (truly) 494; at any rate, at all events; without fail; coute que coute[Fr], coute qu’il coute[Fr]; whatever may happen, if the worst come to the worst; come what may, happen what may, come what will; sink or swim; rain or shine. 
     Phr. cela va sans dire[Fr]; there is -no question, — not a shadow of
doubt; the die is cast &c. (necessity) 601; “facts are stubborn things” [Smollett].

—­ p. 136 —­

     #475.  Uncertainty. —­ N. uncertainty, incertitude, doubt; doubtfulness
&c. adj.; dubiety, dubitation[obs3], dubitancy|, dubitousness[obs3].
     hesitation, suspense; perplexity, embarrassment, dilemma,
bewilderment; timidity &c. (fear) 860; vacillation &c. 605;
diaporesis[obs3], indetermination.
     vagueness &c. adj.; haze, fog; obscurity &c. (darkness) 421; ambiguity
&c. (double meaning) 520; contingency, dependence, dependency, double contingency, possibility upon a possibility; open question &c. (question) 461; onus probandi[Lat]; blind bargain, pig in a poke, leap in the dark, something or other; needle in a haystack, needle in a bottle of hay; roving commission.
     precariousness &c. adj.; fallibility. 
     V. be uncertain &c. adj.; wonder whether.
     lose the clue, lose the clew, scent; miss one’s way.
     not know what to make of &c. (unintelligibility) 519, not know which
way to turn, not know whether one stands on one’s head or one’s heels; float in a sea of doubt,hesitate, flounder; lose oneself, lose one’s head; muddle one’s brains.
     render uncertain &c. adj.; put out, pose, puzzle, perplex, embarrass;
confuse, confound; bewilder, bother, molder, addle