(n.) The quality or state of being unacquainted; want of acquaintance; ignorance.

Humism Pyrrhonism atheism blankmindedness callowness denial disbelief discredit doubt empty-headedness greenhornism greenness heresy hiatus of learning ignorance ignorantism ignorantness inability to believe inanity incredulity inexperience infidelity innocence know-nothingism knowledge-gap lack of information minimifidianism misbelief nescience nonbelief nullifidianism obscurantism rawness rejection scoffing simpleness simplicity skepticism tabula rasa unacquaintance unbelief unbelievingness unfamiliarity unintelligence unknowing unknowingness unripeness vacuity vacuousness