Dan G.: to butt in, from experience with #djb from mailing lists for #qmail, #djbdns, etc...
When djb states facts, he is invariably correct. When he presents a logical argument, he is rigorous, but it is frequently non-trivial to follow. Very dense logic, and perhaps omission of the more "obvious" steps, mean you can't grasp it on first read.
When taking apart someone else's argument, it's even denser and crammed with references. But worth it. Spend the time.