 The method of reflective equilibrium has been advocated as a coherence account of justification (as contrasted with an account of truth) in several areas of inquiry, including inductive and deductive logic as well as both theoretical and applied philosophy. The key idea underlying this view of justification is that we “test” various parts of our system of beliefs against the other beliefs we hold, looking for ways in which some of these beliefs support others, seeking coherence among the widest set of beliefs, and revising and refining them at all levels when challenges to some arise from others. For example, a moral principle or moral judgment about a particular case (or, alternatively, a rule of inductive or deductive inference or a particular inference) would be justified if it cohered with the rest of our beliefs about right action (or correct inferences) on due reflection and after appropriate revisions throughout our system of beliefs. By extension of this account, a person who holds a principle or judgment in reflective equilibrium with other relevant beliefs can be said to be justified in believing that principle or judgment.