http://en.wikipedia.org/wiki/File:Graham%27s_Hierarchy_of_Di...
I don't care how "settled" the science is on any subject; it doesn't necessitate diluting the discourse. I'm no climate science denier, but I'm still willing to listen to an opposing argument on that topic or any other without resorting to ad hominem. If you don't have something of value to add, please close the browser tab and get back to work.
Equating Kurzweil with Nostradamus is highly exaggerative (I don't recall the latter employing any mathematical models), but I would listen to anything Nostradamus-related based on the arguments and evidence, not the name.
The real issue is that HN strives for a higher standard of discussion, and ad hominems fall below that standard whether or not they are true. Snarky name-calling should stay on reddit.
(PS: Love the username.)
http://en.m.wikipedia.org/wiki/Ray_Kurzweil#section_1
Stop insulting yourself.
Especially when you are accomplished at complete irrelevant fields that one you are blathering about...