I was at that meeting. I asked him about that in person, and also in blog posts afterwards. How do you measure ontogenetic depth? Share your procedure so I can assess and replicate it, which is what scientists are supposed to do. He hemmed and hawed and hmmphed and in typical Nelsonian fashion babbled and burbled on, and the upshot was that he couldn’t tell me just then, but he had something he was writing and he’d polish it up and get it to me the next day, 7 April. He didn’t. We’ve been watching the 7th of April pass by for nine years now.