I was having a chat with someone who seemed to believe apology was only about Christian apologetics. It isn't, as the examples in this comment point out. The definition I would hang with in the set was from Wiki:
In modern times, apologists refers to authors, writers, editors of scientific logs or academic journals, and leaders known for defending the points in arguments, conflicts or positions that receive great popular scrutinies and/or are minority views.Right after posting that, I ran across a skit from Monty Python that is one of my all-time favorites - along with the Lumberjack Song of course (and the Cheese Shop . . .). It is, IMO, an example of Epic Fail at apology by the shop owner.
Admittedly, the evidence against the position he was defending was pretty conclusive.