&c (skillful) 698; omniscient; self-taught.
     known &c. v.; ascertained, well-known, recognized, received,
notorious, noted; proverbial; familiar, familiar as household words, familiar to every schoolboy; hackneyed, trite, trivial, commonplace.
     cognoscible[obs3], cognizable. 
     Adv. to one’s knowledge, to the best of one’s knowledge. 
     Phr. one’s eyes being opened &c. (disclosure) 529; ompredre tout c’est
tout pardonner[French:  to know all is to pardon all]; empta dolore docet experientia[Lat];gr/gnothi seauton/gr[Grk]; “half our knowledge we must snatch not take” [Pope]; Jahre lehren mehr als Bucher[German:  years teach more than books]; “knowledge comes but wisdom lingers"[Tennyson]; “knowledge is power” [Bacon]; les affaires font les hommes [Fr]; nec scire fas est omnia [Lat][Horace]; “the amassed thought and experience of innumerable minds” [Emerson]; was ich nicht weiss macht mich nicht heiss[Ger].

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     #491.  Ignorance. —­ N. ignorance, nescience, tabula rasa[Lat], crass
ignorance, ignorance crasse[Fr]; unfamiliarity, unacquaintance[obs3]; unconsciousness &c. 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[obs3], glimmering,
dilettantism; bewilderment &c. (uncertainty) 475; incapacity.
     [Affectation of knowledge] pedantry; charlatanry, charlatism[obs3];
Philister[obs3], Philistine. 
     V. be ignorant &c. adj.; not know &c. 490; know not, know not what,
know nothing of; have no idea, have no notion, have no conception; not have the remotest idea; not know chalk from cheese.
     ignore, be blind to; keep in ignorance &c. (conceal) 528.
     see through a glass darkly; have a film over the eyes, have a
glimmering &c. n.; wonder whether; not know what to make of &c. (unintelligibility) 519; not pretend to take upon, not take upon one self to say. 
     Adj. ignorant; nescient; unknowing, unaware, unacquainted, unapprised,
unapprized[obs3], unwitting, unweeting|, unconscious; witless, weetless[obs3]; a stranger to; unconversant[obs3].
     uninformed, uncultivated, unversed, uninstructed, untaught,
uninitiated, untutored, unschooled, misguided, unenlightened; Philistine; behind the age.
     shallow, superficial, green, rude, empty, half-learned, illiterate;
unread, uninformed, uneducated, unlearned, unlettered, unbookish; empty-headed, dizzy, wooly-headed; pedantic;
     in the dark; benighted, belated; blinded, blindfolded; hoodwinked;
misinformed; au bout de son latin, at the end of his tether, at fault; at sea &c. (uncertain) 475; caught tripping.
     unknown, unapprehended, unexplained, unascertained,
uninvestigated[obs3], unexplored, unheard of, not perceived; concealed &c. 528; novel.