Category talk:Unknown content

What's this category for?
I don't fully understand the purpose of this category. What's it for? Jason Quinn (talk) 07:06, 24 August 2013 (UTC)
 * February seems like a long time ago now, but I think it began with me observing that neither Censoring (statistics) nor Null (SQL) seemed to fit very well in Category:Missing data even though they feel as if they all have something in common with each other. The category seemed to be reasonably at home in Category:Abstraction which was another reason for trying it out on the wider Wikipedia public. It's a hard one to populate though. --Northernhenge (talk) 12:37, 27 August 2013 (UTC)