sou, you make sense although i'm not sure it's productive to set up dichotomies. http://en.wikipedia.org/wiki/False_dilemma
neither is it productive to inject further hyperbole, or 'trichotomies' for that matter
i prefer to think of cases occupying points along a spectrum, but even that idea is too linear... maybe an escher-esque 3D spectrum
as for the credibility of research, i remember hearing some kind of statistic about the amount of past scientific literature that has proved to be wrong. here is a single result from a very quick search, but:
Dr. John Ioannidis .. "charges that as much as 90 percent of the published medical information that doctors rely on is flawed."
no matter the research subject, we're all trying to navigate our way through a mire of biases, our own and those of others!