I think there's an easy answer. He's heard of people living to 100. He's human, thus overly optimistic, and assumes he'll live until 100. I don't think that

I think there's an easy answer. He's heard of people living to 100. He's human, thus overly optimistic, and assumes he'll live until 100. I don't think that can be called a lie. Just a flaw in human logic. I think most of your clues are inconclusive, but I don't care one way or another. I'm just going to sit back, relax and hope that the emotions I feel from this blog are less real than the actual blog. Because that is what a story is, and one way or another this man is telling a story.