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Working on a site for a dentist.  They have a long list of services that they want us to flesh out with text.  They provided a bullet list of services, we're trying to get 1 to 2 paragraphs of text for each. Obviously, we're not going to write this off the top of our heads.  We're pulling text from other sources and trying to rework. The question is, how much rephrasing do we have to do to avoid a duplicate content penalty?  Do we make sure there are changes per paragraph, sentence, or phrase? Thanks! Eric