Pretence is symbolic, referential and communicative behaviour. Whether manifested as a mentation, or more usually as some physical act, pretence invariably involves acting as if one thing was another. The mental architecture of pretence, as well as its language and analysis, seems anchored to some type of bifurcation that separates modalities or representations of reality. The nexus of links established between play, morality and art was furthered in the Kantian doctrine of the sublime whereby play, such as that displayed by children, exemplified an autotelic rationale and self-realising finality - it embodied ‘purposiveness without purpose’. The imagination partook of a reality it sought to render intelligible. This chapter also presents an overview of the key concepts discussed in this book.