Common sense is a complex and contested phenomenon. The practice of systematic scepticism is a key aspect of social science, particularly in the analysis of common sense and the consideration of the social construction of social problems. Social constructionism emphasises the importance of social expectations in the analysis of taken-for-granted and apparently natural social processes. It starts by exploring the assumptions associated with the naming or labelling of things. It is sceptical about any form of essentialism, which seeks to explain social phenomena in terms of natural or biological drives.