Retributivism See PUNISHMENT.

Retrocausation See CAUSATION.

Return, eternal See ETERNAL RETURN.

Revelation See PHILOSOPHY OF RELIGION.

Revisionary metaphysics See METAPHYSICS.

Rhazes See AL-RAZI.

Richard Kilvington See KILVINGTON.

Richard Rufus also called Richard of Cornwall (d. c.1260), English philosopher-theologian who...

Richard’s paradox See SEMANTIC PARADOXES.

Rickert, Heinrich See NEO-KANTIANISM.

Ricoeur Paul (b.1913), French hermeneuticist and phenomenologist who has been a...

Riemann, G. F. B See NON -EUCLIDEAN GEOMETRY.

Right action See ETHICS.

Right of nature See HOBBES.

Right, absolute See RIGHTS.

Right, prima facie See RIGHTS.

Rightness, objective See OBJECTIVE RIGHTNESS.

Rightness, subjective See OBJECTIVE RIGHTNESS.

Rights advantageous positions conferred on some possessor by law, morals, rules,...

Rights, Hohfeldian See HOHFELD.

Rights, imperfect See GROTIUS.

Rights, legal See RIGHTS.

Rights, natural See RIGHTS.

Rights, perfect See RIGHTS.

Rigid designator See MEANING.

Rigorism the view that morality consists in that single set of...

Rigorous duty See DUTY.

Ring of Gyges a ring that gives its wearer invisibility, discussed in Plato's...

Robot See COMPUTER THEORY.

Role responsibility See RESPONSIBILITY.