   Definition III. The expressions ‘set of all objects \(m\)’ and ‘class [klasa] of objects \(m\)’ are used to denote every object \(A\) such that (i) every \(m\) is an ingredient of \(A\), and (ii) if \(B\) is an ingredient of \(A\), then some ingredient of \(B\) is an ingredient of some \(m\).  