"In attempting to assess the criminal responsibility of murderers, the law tries to divide them (as it does all offenders) into two groups, the 'sane' and the 'insane.' The 'sane' murderer is thought of as acting upon rational motives that can be understood, though condemned, and the 'insane' one as being driven by irrational senseless motives.
"Hiltzaileen erantzukizun kriminala finkatzeko asmoz, legeak bi sailetan banatzen ditu: "zuhurrak" eta "eroak". Hiltzaile "zuhurtzat" hartzen du, gaitzesgarriak izan arren, ulergarriak diren zentzuzko eragileek bultzaturik jarduten duena, eta hiltzaile "erotzat", zentzurik gabeko eragile irrazionalek bultzatua.