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Although I have the greatest respect for Alan Turing, I am not sure that he should have a subcatagory all to himself. is this an error or have I missed something?

How can we identify e.g. those born in the 17th century? (This is a general question: a positive answer would assist in many other places too.) 12:32, 3 February 2009 (UTC)Johnbibby (talk)