Distinguishing gender norms from biological facts

According to Hilde Lindemann, some feminists think that equality with men should be the aim of feminism, whereas others argue that feminists should identify and affirm the positive features of femininity that make women different from men. First, briefly explain the problems that Lindemann identifies with both of these positions. Second, using an example, explain what it means to understand gender as a norm. Third, according to Lindemann, why do some feminists insist on distinguishing gender norms from biological facts about sexual difference?