Because we're talking about plagiarism, and because this is so often a point of confusion in internet debates, I want to just point out that plagiarism and copy

Because we're talking about plagiarism, and because this is so often a point of confusion in internet debates, I want to just point out that plagiarism and copyright are almost unrelated things. * plagiarism is not generally against the law, although it is a violation of school policies and can get you punished by your school. It's claiming someone else's work as your own. It may or may not involve a copyright violation, it can be plagiarism without involving a copyright violation -- it could be the author gave you permission, or the item isn't in copyright, or it would count as "fair use" -- it's still plagiarism if your teacher/school/honor code panel says it is. * copyright is about the law, violating a copyright is against the law and can get you civil or criminal penalties. It involves copying work someone else legally owns without permission. It may or may not involve claiming the work as your own, for the most part whether you attribute something properly or claim it for your own is not relevant to whether it is a copyright violation. (I suppose in some edge cases it could be relevant to whether you have a "fair use" defense, but mostly it's not significant in whether something is a copyright violation).