An alternate view of Copyright

Question. Sherrie Levine took a photograph of Edward Weston's photograph of his son, did Levine breach copyright? Follow this link to an article by Abigail Solomon-Godeau but beware as reading it plays with your mind.

http://audfilm.com/BeFakeRemake/Abigail%20Solomon-Godeau%20-%20Winning%20the%20Game%20When%20the%20Rules%20Have%20Been%20Changed.pdf