  Kotarbiński called (R3) “the thesis of pansomatism” (pansomatism is derived from the Greek term soma which means ‘body’; hence, pansomatism claims that every object is a body, assuming that bodies are material). It indicates that reism defined by (R1)–(R3) is a kind of materialism. Kotarbiński sometimes used the terms ‘reism’, ‘pansomatism’ and ‘concretism’ as equivalents.