Dr. Syntax on "Fair Use"

Commenting on a post here about Robert Spoo's criticism of the devitalization of scholarship that can arise from "designing around copyrights," Peter Ginna, the guiding spirit behind Dr. Syntax (the always wise and literate blog on books and publishing) joins in urging that writers "shouldn't be too diffident about relying on the principle of fair use." See, in particular, Peter's praise for the vintage advice on fair use and copyright permissions from The Chicago Manual of Style.