For example, what would be inappropriately off topic to post to LessWrong discussion about?
I couldn't find an answer in the FAQ. (Perhaps it'd be worth adding one.) The closest I could find was this:
What is Less Wrong?
Less Wrong is an online community for discussion of rationality. Topics of interest include decision theory, philosophy, self-improvement, cognitive science, psychology, artificial intelligence, game theory, metamathematics, logic, evolutionary psychology, economics, and the far future.
However "rationality" can be interpreted broadly enough that rational discussion of anything would count, and my experience reading LW is compatible with this interpretation being applied by posters. Indeed my experience seems to suggest that practically everything is on topic; political discussion of certain sorts is frowned upon, but not due to being off topic. People often post about things far removed from the topics of interest. And some of these topics are very broad: it seems that a lot of material about self-improvement is acceptable, for instance.
The relevant question is not whether adults should be able to handle them, but whether adults actually can. Specifically, whether serious discussions of (say) religion or sex or or party politics between adults are usually conducted in a manner that LW participants would recognize as rational. If ordinary adults outside LW are generally content to discuss these things and some people on LW are not, this may indicate not that the LWers in question are intellectually deficient but merely that their standards are higher.
Incidentally, I find your comments curious in view of your recent comment which appears to say, roughly, "I am only interested in discussions on LW that are directly related to rationality and am sad that other things occupy so much of LW". ... But I suppose I probably misunderstood you and what you meant was "Of the things LW actually discusses much, rationality is the only thing that I find interesting [but there are all kinds of other discussions I'd be interested in having here if other people were willing to have them]".
Relative to the general population baseline, adults can and do handle those topics. More so in real life. A community that prides itself on better thinking and debating practices should produce above-average-quality discussions on these topics, rather than flee from them like they bring about the death of the community.
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