Principle: Nothing is an offence which is done by a person who, at the time of doing it, by reason of unsoundness of mind, is incapable of knowing the nature of the act, or that he is doing what is either wrong or contrary to law. Facts: A takes his son B who is three years old, for a bath to the well. He throws his son inside the well so that he could have a good bath. After 10 minutes, he also jumped in the well to take a bath and take his son out of the well. Both were rescued by the villagers but his son was found dead.