Rick Anderson writes: “If you’ve ever received a copy of an in-copyright document supplied by your library, you’ve likely seen a [copyright notice]. And if you’re someone who is fairly familiar with US copyright law, and especially with the fair use doctrine, that notice may have led you to ask yourself the following question: ‘Why are my rights more constrained with regard to a copy made for me by the library than they would be if the copy were made anywhere else?’”