Ignorance may be conveniently divided by the legislator into two sorts:there is simple ignorance, which is the source of lighter offences, anddouble ignorance, which is accompanied by a conceit of wisdom; and hewho is under the influence of the latter fancies that he knows all aboutmatters of which he knows nothing.
Plato 428/427 BC – 348/347 BC), Laws (360 BC)
