Unless you've been living under a rock for the past few weeks, I'm sure you've heard of Bill O'Reilly's complete lack of understanding of how the tides work, how the sun rises and sets, and how the moon got in the sky.  Clearly, one could say that even a third grader could tell you the science behind the rising and setting of the sun and the functions of the tides.   Well, not 20 minutes ago, on…