What is the most efficient numerical base system? was a perfectly good question that accumulated a few good references in the comments when the OP deleted it. What should be done in this sort of situation?

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    $\begingroup$ Maybe Requests for Reopen Votes thread can be used for Requests for Undelete Votes too? Just a thought. The more general thought is this is one of many reasons why answers should not be given in comments. $\endgroup$ – 40 votes Jul 18 '13 at 16:33
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    $\begingroup$ However, answers consisting only of links are discouraged, so that's a bit of a catch-22. $\endgroup$ – dfeuer Jul 18 '13 at 16:58
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    $\begingroup$ Correct. It is better to explain why the hyperlinked resource answers the question. If this is not done, then it's indeed a comment -- and the user should't be surprised if their half-baked contribution goes away at the whim of the OP. Comments are not considered to be of archival value. $\endgroup$ – 40 votes Jul 18 '13 at 17:04
  • $\begingroup$ 10k users can vote to undelete. The question already has 2 votes. $\endgroup$ – Ayman Hourieh Jul 18 '13 at 17:23
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    $\begingroup$ The question has been undeleted. $\endgroup$ – Asaf Karagila Jul 18 '13 at 17:31
  • $\begingroup$ So, should this question be now deleted by the OP? $\endgroup$ – 40 votes Jul 19 '13 at 1:01
  • $\begingroup$ @40votes: No, because it has useful comments. $\endgroup$ – dfeuer Jul 19 '13 at 4:07
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    $\begingroup$ The deleted question has now been restored. $\endgroup$ – dfeuer Jul 19 '13 at 4:08
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    $\begingroup$ I think @40votes wanted to apply the duality theorem ;) $\endgroup$ – Prism Jul 19 '13 at 7:30

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