This chapter speaks to university teachers who are concerned about plagiarism and want to address it constructively, but feel that they may not have all the tools or information they need to do so. It approaches the issue from a variety of theoretical angles in order to provide a framework for discussion and research. Jordan Canzonetta addresses the issue of trust between teachers and students, and the role which plagiarism, and tools for detecting plagiarism, play in that important relationship. Deceptive intertextuality exists, as Anton's student exemplifies, but non-deceptive unconventional intertextuality can arise by accident even when one knows the conventions, as Ezra's error shows. Regardless of the perspective adopted, some plagiarism at least needs to be situated in the context of other breaches of academic ethics, a broad category which includes acts perpetrated by both students and teachers. Plagiarism, then, is an outlier, a misfit, a square peg in the landscape of good and bad writing behaviours.