 For example, Hacking (1999, Ch. 5) distinguishes between ‘child abuse’ and ‘satanic ritual abuse’. Satanic ritual abuse is a socially constructed idea, but not a social kind. In the 1990s, there was an exhaustive investigation into satanic ritual abuse in Great Britain after a number of reported cases. However, an independent commission claimed that none of the charges were substantiated by evidence. Thus, our constructed categories are subject to empirical investigation. We must establish a referent class for our constructed categories. For example and in contrast, a kind such as child abuse is considered real. The emergence of the category can be traced to a definite time (1961) at a definite place (Denver) in the discussions of paediatricians. Moreover, the reference of the category was abused children. This reference dynamically changed as the idea became embedded in new legislation, incorporated in practices involving social workers, police, schoolteachers etc. (see Hacking 1999, Ch. 5.) But, importantly real instances of the category were found through empirical investigation.