The lack of knowledge or education.

Roget 481: misjudgment, obliquity of judgment; miscalculation, miscomputation, misconception etc. (error) 495; hasty conclusion.    [causes of misjudgment. 1] prejudgment, prejudication^†, prejudice; foregone conclusion; prenotion^†, prevention, preconception, predilection, prepossession, preapprehension^†, presumption, assumption, presentiment; fixed idea, preconceived idea; id_ee fixe; mentis gratissimus error [Lat.]; fool's paradise.    [causes of misjudgment. 2] esprit de corps, party spirit, partisanship, clannishness, prestige.    [causes of misjudgment. 3] bias, bigotry, warp, twist; hobby, fad, quirk, crotchet, partiality, infatuation, blind side, mote in the eye.    [causes of misjudgment. 4] one-sided views, one-track mind, partial views, narrow views, confined views, superficial views, one-sided ideas, partial ideas, narrow ideas, confined ideas, superficial ideas, one-sided conceptions, partial conceptions, narrow conceptions, confined conceptions, superficial conceptions, one-sided notions, partial notions, narrow notions, confined notions, superficial notions; narrow mind; bigotry etc. (obstinacy) 606; odium theologicum [Lat.]; pedantry; hypercriticism.    doctrinaire etc. (positive) 474.    [causes of misjudgment. 5] overestimation etc. 482; underestimation etc. 483.    [causes of misjudgment. 6] ignorance etc. 491.    erroneous assumptions, erroneous data, mistaken assumptions, incorrect assumptions (error) 495.    ... show more

Roget 491: ignorance, nescience, tabula rasa [Lat.], crass ignorance, ignorance crasse [Fr.]; unfamiliarity, unacquaintance^†; unconsciousness etc. adj.; darkness, blindness; incomprehension, inexperience, simplicity.    unknown quantities, x, y, z.    sealed book, terra incognita, virgin soil, unexplored ground; dark ages.    [Imperfect knowledge] smattering, sciolism^†, glimmering, dilettantism; bewilderment etc. (uncertainty) 475; incapacity.    [Affectation of knowledge] pedantry; charlatanry, charlatism^†; Philister^†, Philistine.    ... show more

Dutch: agnosie, ignorantie, onkunde, onwetendheid
Polish: nieobeznanie, ignorancja, nieznajomość, nieuctwo, niewiedza