This is an example of a rhetorical question. In this text, Sojourner Truth repeats the question "ain't I a woman?" in order to encourage the audience to think about the significance of the arguments that have been presented. By asking this, Sojourner Truth encourages the audience to consider the treatment given to women, and in particular black women, and wonder whether it is fair. The question is not meant to be answered, but instead it is meant to encourage the audience to reflect on a particular topic.
