Oakeshott Michael (1900–91), British philosopher and political theorist trained at Cambridge...

obiectum quo (Latin 'object by which'), in medieval and Scholastic epistemology, the object...

object, intentional See BRENTANO.

object, propositional See PROPOSITION.

objective body See EMBODIMENT.

objective probability See PROBABILITY.

objective reality See DESCARTES, REALITY.

objective reason See REASONS FOR ACTION.

objective rightness In ethics, an action is objectively right for a person...

objectivism See ETHICAL OBJECTIVISM.

object language See METALANGUAGE.

objectual quantification See QUANTIFICATION.

obligating reason See REASONS FOR ACTION.

obligation See DEONTIC LOGIC, ETHICS.

obligation, political See POLITICAL PHILOSOPHY.

obligationes the study of inferentially inescapable, yet logically odd arguments, used...

oblique context As explained by Frege in 'Über Sinn und Bedeutung' (1892),...

oblique intention See INTENTION.

observation See PHILOSOPHY OF SCIENCE.

observation language See INCOMMENSURABILITY.

observation sentence See PHILOSOPHY OF SCIENCE.

observation term See PHILOSOPHY OF SCIENCE.

obversion a sort of immediate inference that allows a transformation of...

obviousness See SELF-EVIDENCE.

Occam, William See OCKHAM.

occasionalism a theory of causation held by a number of important...

occurrent See DISPOSITION.

occurrent belief See BELIEF.

occurrent memory See MEMORY.

occurrent state See STATE.