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This is not the biographer's ""opinion."" This was his ""conclusion"" after numerous interviews, as stated in the source. If you want to know ""who"" all the women were, you should read the book. Assuming that a biographer's research can be somehow ""balanced"" with a woman's mother's statement about seeing her daughter looking ""roughed up"" in a car, is an obvious problem. Biographer's avoid giving their personal ""opinions"" in their books.  "