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Your Letters: 'Information Diet'; Legal Karaoke

Last week, we spoke with Clay Johnson, an open-source advocate and digital strategist, about his new book, "The Information Diet: A Case for Conscious Consumption." We looked at the confusing copyrights of karaoke music and the Richard Strauss masterwork, Also Sprach Zarathustra, otherwise known as the film score for 2001: A Space Odyssey. Host Scott Simon reads listener comments on these stories and more.