I sometimes catch flak for repeating this, but there was a time when I thought there might be something to acupuncture. I don't care, because, as a blogger, when I write a post I assume that a significant fraction of people reading it have never seen this blog before and therefore aren't even the least bit familiar with what I've written before on the subject. That makes them a blank slate, as far as this blog is concerned, and obliges me to explain everything.