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I didn't know the comments were 'disposable' as I thought they were also contributions covered by the CC-by-sa license. What are their status??

See comment by @joran there Specifying directly factor levels and sizes

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Comments are second-class citizens. They didn't even exist when SO was created.

The moderators routinely destroy irrelevant comments, so don't put any important stuff in the comments; put it in answers instead.

I thought they were also contributions covered by the CC-by-sa license

How does that change anything? Questions and answers can be deleted by users with over 10000 reputation; comments can also be deleted (only by moderators).

  • That is important as if you can derive work, it doesn't mean you can just destroy other people content. In fact, this aks the question of the ownership, copyright of the whole content around here. – green diod Aug 5 '13 at 1:38
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    @green Wait, what? Once you post something on SO, it is no longer yours. You don't own it any more. You can't copyright your posts - they are all CC licensed. – Doorknob Aug 5 '13 at 1:41
  • If it's not mine, does it make theirs (ppl with 10k+ rep) to dispose of? BTW, depending on the country, the content ownership can't be transferred like that. Anyway CC is for creative commons, not destructive 10k+ rep. – green diod Aug 5 '13 at 1:46
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    @greendiod Stack Exchange is in New York, so only US law applies. As well, just because you own rights to something doesn't mean the network you're hosting it on is obligated in any way to keep it around. It's your responsibility to keep copies of anything important you don't want to disappear. – animuson Aug 5 '13 at 1:50
  • Clarification: when questions and answers are deleted they are still viewable by users with >10K rep (you need a direct link though because they don't show up in lists or search results). When comments are deleted they are not viewable by anyone except diamond mods (and staff of course). – slugster Aug 5 '13 at 2:48
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    @Doorknob There is no actual transfer of ownership when content is posted to Stack Exchange. You release it to Stack Exchange under the CC license and the TOS, but you retain ownership of the copyright. One might say "you don't own it anymore" in a rhetorical sense -- you no longer have complete control over how it is used -- but in a legal sense, you do still own it. CC licensing is a use of your copyright, not an alternative to it. – Jeremy Banks Aug 5 '13 at 3:37
  • Of course, moderators should not be destroying comments that contain important stuff, so there should be little risk in putting important stuff in comments if it won't fit as an answer. – Cody Gray Aug 5 '13 at 5:35
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    @CodyGray It's can be difficult to spot that one important comment in the sea of "me too"'s "what have you tried"'s etc. so if you want to say something truly important make sure it's in a question or answer. – ChrisF Aug 5 '13 at 9:56
  • @greendiod ownership of a comment does not give you the right to impose an obligation on anyone else to host your content. So if you generate a creative work in a comment, it remains yours: but there is no obligation on Stack Exchange, or anyone else, to host it for you. – EnergyNumbers Aug 5 '13 at 11:44
  • @EnergyNumbers I don't want to impose any obligation on anyone else. But you're nipicking here, so why Stack Exchange has offered to host any content at all in the first place?? Aren't they the first to profit from other people freely given time and content???? – green diod Aug 5 '13 at 23:29
  • @JeremyBanks Yeah, it's the true meaning and intent of the CC license but apparently, a few people here see it otherwise. – green diod Aug 5 '13 at 23:32

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