IMPOTENTIA EXCUSAT LEGEM by Law Professor Latin, meaning Impossibility is an excuse in the law. Related Posts:IGNORANTIA FACTI EXCUSAT IGNORANTIA JURIS NON EXCUSATIGNORANTIA LEGIS NON EXCUSATINJURIA NON EXCUSAT INJURIAMIGNORANCE OF THE LAWIMPOTENCENECESSITAS NON HABET LEGEM