Livingston-Wheeler therapy

At least half the time, it seems that when I take on a relatively new topic with every intention of just doing one post about it I somehow end up doing more than one post. I don't know why that is. It just seems to happen. Sometimes, I find something related to but sufficiently different that interests me, sometimes seemingly quite at random. Sometimes someone responds to my post in such a way that I feel obliged to answer. Sometimes, readers make me aware of variations on a theme, so to speak, either in the comments or by e-mailing me links. That's what happened this time. Yesterday I posted…