A fundamental aspect of human intelligence is the ability to represent and reason relations. Examples of relational thinking include our ability to appreciate analogies between diVerent objects or events (Gentner, 1983; Holyoak & Thagard, 1995); our ability to apply abstract rules in novel situations (e.g., Smith, Langston, & Nisbett, 1992); our ability to understand and learn language (e.g., K...