At one point in the play, Martin attempts to defend his actions with the goat by insisting that they are ALL animals. Stevie reacts, as the audience would, with disgust, and shrieks, "we stay with our own kind!" In this interaction, we see more rigid categories defined: some works from this course encourage breaking down barriers and developing kinship with animals (like Elizabeth Costello), while this play carefully outlines the boundaries that need to be set between kinds.