Questions are also deleted years later when the moderators arbitrarily decide to. They refused to delete my questions when I deleted my account, which made sense because they didn't want to lose all that information. I had over 100 questions, maybe 150 questions, after all.
Tonight, however, someone deleted my question because I discussed it on HN.
I agree with you. However, the problem is that we can't consider something as a true positive (for a paper) based on gut or intuition. We have to rely on some sort of ground truth and this is the best sanitized sample we could get.
Tonight, however, someone deleted my question because I discussed it on HN.