We have recently witnessed a steep increase in the number of cases of (presumed) plagiarism. I don’t think the issue will go away; but I also do think that we need to think about plagiarism itself - what it means and how we can approach it. I spent quite a bit of time thinking about the subject matter, and I just summarized my current thinking in a longer article entitled Photography, Copyright, Plagiarism, and the Internet. While I’m sure that I overlooked some aspects, I’m hoping to advance the debate a bit by suggesting a set of four criteria that all have to be met in a case of plagiarism.