 There is little point in attempting to distinguish systematically between a natural world and an artefactual one, except when we are concerned with the ways in which terms such as “natural” may have particular consequences or entailments, as when a commodity in the shops is labelled “natural” simply because a single ingredient, such as a chemical dye, has been deleted, or when something as apparently natural as radiation is taken to be antithetical to true “nature”. (Miller 1994, 398)