Idiocy /(ĭd"ĭ*ō̇*sy̆)/

Id·i·o·cy

Idiocy

n.
  1. The condition or quality of being an idiot; absence, or marked deficiency, of sense and intelligence.
    I will undertake to convict a man of idiocy, if he can not see the proof that three angles of a triangle are equal to two right angles.