Idiocy /(ĭd"ĭ*ō̇*sy̆)/
Id·i·o·cy
Idiocy
n.
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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.