Wei_Dai writes “I wonder if I’m missing something important by not playing chess.”
I am a somewhat decent chess player[*] and a reasonable Go player (3 dan, barely, at last rated tournament a few years ago). If you’re inclined to thinking about cognition itself, and about questions like the value of heuristics and approximations that only work sometimes, such games are great sources of examples. In some cases, the strong players have already thinking along those lines for more than a century, though using a different vocabulary. E.g., Go concepts like aji and thickness seem strongly related to Less Wrong discussions of the relative value of conjunctive and disjunctive plans.
There might also be some rationalist value in learning at the gut level that we’re not on the primordial savannah any more by putting a thousand or so hours or more into at least one discipline where you can be utterly unmistakably crushed by someone who scores a zero on the usual societal/hindbrain tags for seriousness (like a bored 9 year old Ukrainian who obliterates you in the first round of the tournament on the way to finishing the tournament undefeated with a rating provisionally revised to 5 dan:-).
That said, I think you will probably get much more bang for your rationalist-wins-the-world buck from studying other things. In particular, I’d nominate (1) math along the usual engineering-ish main sequence (calculus, linear algebra, Fourier analysis, probability, statistics) and (2) computer programming. History and microeconomics-writ-large are also strong candidates. So it’s not particularly worth studying chess or go beyond the point where you just find it fun for its own sake.
[*] highwater mark approximately 60 seconds before I abandoned my experiment with playing chess somewhat seriously: forced threefold repetition against a 2050ish-rated player who happened to be tournament director of the local chess club minitournament, who had told me earlier that I could stop recording when my clock fell below 5 minutes, and who ruled upon my 3-fold repetition that it didn’t count as a draw because the game was not being recorded
You wrote “what I chose to do to resolve the matter was to deep dive into three often-raised skeptic arguments using my knowledge of physics as a starting point” and “deliberate misinformation campaigns in the grand tradition of tobacco [etc.]”.
Less Wrong is not the place for a comprehensive argument about catastrophic AGW, but I’d like to make a general Less-Wrong-ish point about your analysis here. It is perceptive to notice that millions of dollars are spent on a shoddy PR effort by the other side. It is also perceptive to notice that many of the other side’s most popular arguments aren’t technically very strong. It’s even actively helpful to debunk unreasonable popular arguments even if you only do it for those which are popular on the other side. However, remember that it’s sadly common that regardless of their technical merits, big politicized controversies tend to grow big shoddy PR efforts associated with all factions. And even medium-sized controversies tend to attract some loud clueless supporters on both sides. Thus, it’s not a very useful heuristic to consider significant PR spending, or the popularity of flaky arguments, as particularly useful evidence against the underlying factual position.
It may be “too much information [about AGW]” for Less Wrong, but I feel I should support my point in this particular controversy at least a little, so… E.g., look at the behavior of Pachauri himself in the “Glaciergate” glaciers-melting-by-2035 case. I can’t read the guy’s mind, and indeed find some of his behavior quite odd, so for all I know it is not “deliberate.” But accidental or not, it looks rather like an episode in a misinformation campaign in the sorry tradition of big-money innumerate scare-environmentalism. Also, Judith Curry just wrote a blog post which mentions, among other things, the amount of money sloshing around in various AGW-PR-related organizations associated with anti-IPCC positions. For comparison, a rather angry critic I don’t know much about (but one who should, at a minimum, be constrained by British libel law) ties the Glaciergate factoid to grants of $500K and $3M, and Greenpeace USA seems to have an annual budget of around $30M.