 Popper was aware that he would be accused of hypostatising abstractions in asserting the reality and objectivity of world 3 objects. In response, he indicates strongly that he has no interest in what he regards as pointless terminological disputes over the meaning of the term “world” or “real”. He is therefore content, if required, to express his account of objective knowledge in more familiar and perhaps more mundane terms: world 3 objects are abstract objects while their physical embodiments are concrete objects. But that should not be allowed to disguise the fact that he saw the relationships between the three categories of his ontology as of enormous importance in understanding the role of science as an element of culture: