Although his two arguments are generally related to morality, Williams' argument focuses on the case of internal defense based on internal ethical assessment. He insists that the belief of the agent that he is reasonable may largely depend on luck. However, this reason is not related to external agents, as external agents are not obliged to listen for personal reasons. Williams did not object to a specific philosophy, but it is worth noting that ethics opposed the common sense view that liberty from luck and heaven was opposed.
Whatever this is, what is involved with morality? Williams hopes to cause fatal harm to ethics by establishing a clash between rational and moral defense. Williams suggested that rational reasons are at least partially a matter of luck. As we pointed out, moral defense should not be a matter of luck. This obviously leaves room for contradiction between the two reasons that the action is morally unreasonable but reasonably reasonable (and vice versa). Indeed, the example of Gauguin would provide us with such a case. It is morally unreasonable to assume Gauguin's decision to leave his family. Because luck has nothing to do with the moral value of this decision, Gauguin's decision is not a moral decision in making decisions, it can be said that it remains in this state regardless of the outcome of the project. We have to wait for how the project will result
Williams began to move towards this dilemma, focusing on reasonable defense rather than moral defense. The point of his argument is that to some extent reasonable excuses are the idea of luck. He uses thought experiments to explain this. Williams showed us the story based on the life of the painter Paul Gauguin. Williams' Gauguin felt a little responsibility for his family and lived quite a happy life with them, but they gave up and got in trouble. He did this and became a great painter. I believe that he lives in the South Island and lives in a more primitive environment, so that he can develop a gift as a painter more fully. How is Gauguin to judge whether this is reasonable? First of all, you should ask what Williams' 'rational defense' means.