In*cog"i*tance (?), In*cog"i*tan*cy (?), n. [L. incogitantia.]
Want of thought, or of the power of thinking; thoughtlessness; unreasonableness.
'T is folly and incogitancy to argue anything, one way or the other, from the designs of a sort of beings with whom we so little communicate.
© Webster 1913.