It means that the person is mentally ill but is still responsible for the crimes that were committed.
One of the main ways in which lessons learned from World War II influence President Truman’s decision to send troops to aid South Korea after North Korea invaded was that World War II showed that inaction after a country violated the sovereign rights of another could lead to a prolonged conflict.
The Enlightenment movement hugely influenced the west, especially the United States and the Founding Fathers. The system of checks and balances as well as the the separation of power into legislative, judicial and executive branches come from the Enlightenment writers. The famous line from the Declaration of Independence "Life, Liberty and the pursuit of Happiness" was inspired by the writings of Locke and his saying of "Life, Liberty and Property" as we can see.
The First World War destroyed empires, created numerous new nation-states, encouraged independence movements in Europe’s colonies, forced the United States to become a world power and led directly to Soviet communism and the rise of Hitler. Diplomatic alliances and promises made during the First World War, especially in the Middle East, also came back to haunt Europeans a century later. The balance of power approach to international relations was broken but not shattered. It took the Second World War to bring about sufficient political forces to embark on a revolutionary new approach to inter-state relations.