อภิจริยศาสตร์

Also known as meta-ethics

In metaphilosophy and ethics, metaethics (meta-ethics) is the study of the nature, scope, ground, and meaning of moral judgment, ethical belief, or values. It is one of the three branches of ethics generally studied by philosophers, the others being normative ethics (questions of how one ought to be and act) and applied ethics (practical questions of right behavior in given, usually contentious, situations).