• Metaphysics/ontology - study of existence or the true nature of reality

(What is out there?)

• Epistemology - study of knowledge

(How do I know about it?)

• Ethics - study of action

(What should I do?)

• logic - study of reasoning/argumentation / politics - study of force or how humans function in society

(What actions are permissible?)

• Esthetics/Aesthetics - study of art and the notion of beauty

(What can life be like?)