Without fault or error:
— Faultless logic.

synonyms: immaculate, impeccable, incorrupted.

Roget 946: innocent, not guilty; unguilty^†; guiltless, faultless, sinless, stainless, bloodless, spotless; clear, immaculate; rectus in curia [Lat.]; unspotted, unblemished, unerring; undefiled etc. 939; unhardened^†, Saturnian; Arcadian etc. (artless) 703^†.    inculpable, unculpable^†; unblamed, unblamable^†; blameless, unfallen^†, inerrable^†, above suspicion; irreproachable, irreprovable^†, irreprehensible^†; unexceptionable, unobjectionable, unimpeachable; salvable^†; venial etc. 937.    harmless; inoffensive, innoxious^†, innocuous; dove-like, lamb-like; pure, harmless as doves; innocent as a lamb, innocent as the babe unborn; more sinned against than sinning" [Lear]. virtuous etc. 944; unreproved^†, unimpeached, unreproached^†.    ... show more

Roget 650: perfect, faultless; indefective^†, indeficient^†, indefectible; immaculate, spotless, impeccable; free from imperfection etc. 651; unblemished, uninjured etc. 659; sound, sound as a roach; in perfect condition; scathless^†, intact, harmless; seaworthy etc. (safe) 644; right as a trivet; in seipso totus teres atque rotundus [Lat.] [Horace]; consummate etc. (complete) 52; finished etc. 729.    best etc. (good) 648; model, standard; inimitable, unparagoned^†, unparalleled etc. (supreme) 33; superhuman, divine; beyond all praise etc. (approbation) 931; sans peur et sans reproche [Fr.].    ... show more

Polish: nienaganny, przykładny