There are some days when I know what my topic will be what it must be. These are times in which the universe gives the very appearance of handing to me my topic for the day on the proverbial silver platter with a giant hand descending from the clouds, pointing at it, and saying, "Blog about this, you idiot!" Usually, it's because a study is released or something happens or a quack writes something that cries out for rebuttal. Whatever it is, it's big and it's unavoidable (for me, at least).
This is one of those days.