Underreporting of rape and a high ratio of false reports are not mutually exclusive. For a dispassionate explanation, see http://volokh.com/posts/1113597035.shtml. It’s a simple concept.
Your link doesn’t work. But, assuming its arguments are true, and conceptually simple, the “high ratio of false reports” is seized on by Mac Donald and made much of, and the underreporting is ignored, as is the “high ratio” of reports which, by default, must be true.
Even if it is conclusively proved (which I doubt) that many, or half, or whatever, rape cliamants are liars, this is not what Mac Donald implies – she implies that all of them are false. (Except for dark-alley-stranger rapes, which she allows can happen, because they happen to “nice” girls.)





