Reism

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Reism or concretism is a philosophical theory of Tadeusz Kotarbiński, based on the ontology of Stanislaw Lesniewski, specifically, his "calculus of names".

In ontological sense, reism was condensed by Kotarbiński to the two postulates

"every object is a body", i.e., all abstract concepts are be reduced to concrete objects.
no object is a state or relation, or property.

In semantical sense, it is a theory of language which draws a distinction between "real" names, i.e., names associated with bodies and pseudo-names, onomatoids, which denote states, relations, properties, events, etc. It further elaborates on when a sentence is meaningful, when it has a literal, direct sense or when it is meaningful or has an indirect sense.