Okay, I get that talking to Des turned things around with Sayid. So now the question is if he was truly dead (and everyone who witnessed it testified that Sayid was, in fact, dead-dead) what force resurrected him? I thought everyone was on board with it being an evil entity, right? Thus his allegiance to Flock. So, for me, it was a bit too tidy and quick to reverse all that with a simple heart to heart with Des. But, I do love that it validates the belief that good can prevail over evil and free will lies within even zombies! The execution of that premise (in Sayid's case) just seemed a bit too rushed, convenient, and tied with a big white bow for Lost's usual high standards.