 Derksen (1993) differs from most other writers on the subject in placing the emphasis in demarcation on the pseudoscientist, i.e. the individual person conducting pseudoscience. His major argument for this is that pseudoscience has scientific pretensions, and such pretensions are associated with a person, not a theory, practice or entire field. However, as was noted by Settle (1971), it is the rationality and critical attitude built into institutions, rather than the personal intellectual traits of individuals, that distinguishes science from non-scientific practices such as magic. The individual practitioner of magic in a pre-literate society is not necessarily less rational than the individual scientist in modern Western society. What she lacks is an intellectual environment of collective rationality and mutual criticism. “It is almost a fallacy of division to insist on each individual scientist being critically-minded” (Settle 1971, 174).