incognizance

From in- +‎ cognizance.

incognizance (uncountable)

1. Failure to cognize, apprehend, or notice.
   • 1859–1860, William Hamilton, edited by H[enry] L[ongueville] Mansel and John Veitch, Lectures on Metaphysics and Logic […], volume (please specify |volume=I to IV), Edinburgh, London: William Blackwood and Sons, →OCLC:

     Now, this incognizance may be explained on three possible hypotheses.