by nature

assertive categorical pragmatic reasoned

a priori as a matter of course authoritarian authoritative axiomatic by fiat by natural law canonical deducible deductive derivable doctrinaire doctrinal eternal excathedra formal imperative inevitable on faith oracular orthodox peremptory positive prophetic systematic theoretical unchangeable unerring unqualified

ambiguous amenable doubtful doubting dubious equivocal flexible fluctuating indecisive manageable not positive obedient questioning skeptical submissive uncertain vacillating

commonly consistently easily generally instinctively normally simply spontaneously typically uniformly usually

artlessly but of course by birth candidly casually characteristically customarily freely genuinely habitually impulsively informally innocently openly ordinarily readily unaffectedly unpretentiously

difficultly unusually

affectedly unnaturally