However it is not a fact that can be found within the objective world. The world is understood objectively as a system of events that occur according to natural laws. Things like 'agents' and 'free-will' seem alien concepts in the physical world. Again, they are subjective components of our world that have no correlate in our objective understanding. The ethical problem is how to relate the needs of an objective moral code that can span society, with the needs of individuals and their actions.
Induction is, arguably, at the heart of the scientific method.
It allows scientists to infer from particular cases or events, to generalities. The problem of induction is how we can go about justifying the inference. This is an important question in relation to Nagel's concerns because it involves the relationship between the subjective observation of particular events with the formation and justification of objective generalities. The above problems are all related to the more general problem of the relationship between the subjective and objective standpoints. Problem Subjective Aspect Objective Aspect 1.