One of life's crazy coincidences: I just at this very moment looked at that same page and took a quote from it for another comment I just now submitted, before reading yours.
That aside, my "strictly speaking wrong" was, unfortunately, also strictly speaking wrong. For example, the jargon "x gene variant confers a certain immunity versus y disease" is also in good use - otherwise the word "immunity" could never be used period. Vaccinations wouldn't be described by conferring immunity, when sometimes they just limit the extent of the infection to a subclinical level. So in some sense, "immunity to sunburn" isn't even wrong, strictly speaking, just an unfortunately chosen phrase in a forum such as this (which always checks for boundary cases and not for "true in a more general sense", a habit I myself indulge in too much).
I'd normally agree, but in this case CCC explicitly said “black people can't get sunburnt”.
OTOH, I only get sunburnt if I do something deliberate such as sunbathing for an hour around noon in July in Italy, and even then it's relatively mild, and I'm not quite black; I'd expect darker-skinned people to be even more resistant than that. So I'd say that whereas black people can get sunburnt in principle, for all practical purposes they can't. This is still a hell of an advantage compared to the pale northern Europeans I knew who got sunburned by walking around in November in Ireland.
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A list of some posts that are pretty awesome
I recommend the major sequences to everybody, but I realize how daunting they look at first. So for purposes of immediate gratification, the following posts are particularly interesting/illuminating/provocative and don't require any previous reading:
More suggestions are welcome! Or just check out the top-rated posts from the history of Less Wrong. Most posts at +50 or more are well worth your time.
Welcome to Less Wrong, and we look forward to hearing from you throughout the site!
Note from orthonormal: MBlume and other contributors wrote the original version of this welcome post, and I've edited it a fair bit. If there's anything I should add or update on this post (especially broken links), please send me a private message—I may not notice a comment on the post. Finally, once this gets past 500 comments, anyone is welcome to copy and edit this intro to start the next welcome thread.