The argument that each of us constructs her or his own understanding by relating new information on what they already know. It is the assertion that all forms of knowledge are shaped by the social and material cultures within which they are produced and consumed. In relation to climatology, Demerritt (2001) AAAG 91, 307 argues that the reality studied by physical geographers is socially constructed. This has not been universally accepted; see Scheider (2001) AAAG 91, 2, 338.