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.

Rorty Richard (b.1931), American philosopher, notable for the breadth of his...

Roscelin de Compiègne (c.1050–c.1125), French philosopher and logician who became embroiled in theological...

Rosenzweig Franz (1886–1929), German philosopher and Jewish theologian known as one...

Rosmini-Serbati Antonio (1797–1855), Italian philosopher, Catholic priest, counselor to Pope Pius...

Ross W(illiam) D(avid) (1877–1971), British Aristotelian scholar and moral philosopher. Born...

Rousseau Jean-Jacques (1712–78), Swiss-born French philosopher, essayist, novelist, and musician, best...

Royce Josiah (1855–1916), American philosopher best known for his pragmatic idealism,...

Rufus, Richard See RICHARD RUFUS.