 Butler’s second claim is based on her view that“[i]dentity categories [like that of women] are never merely descriptive, but always normative, and as such, exclusionary” (Butler 1991, 160). That is, the mistake of those feminists Butler critiques was not that they provided the incorrect definition of ‘woman’. Rather, (the argument goes) their mistake was to attempt to define the term ‘woman’ at all. Butler’s view is that ‘woman’ can never be defined in a way that does not prescribe some “unspoken normative requirements” (like having a feminine personality) that women should conform to (Butler 1999, 9). Butler takes this to be a feature of terms like ‘woman’ that purport to pick out (what she calls) ‘identity categories’. She seems to assume that ‘woman’ can never be used in a non-ideological way (Moi 1999, 43) and that it will always encode conditions that are not satisfied by everyone we think of as women. Some explanation for this comes from Butler’s view that all processes of drawing categorical distinctions involve evaluative and normative commitments; these in turn involve the exercise of power and reflect the conditions of those who are socially powerful (Witt 1995).