Thu, 29 Oct 2009 16:05:51 +0100 wenzelm Named_Thms is not scalable;
Thu, 29 Oct 2009 14:57:55 +0100 wenzelm replaced slightly odd Thm.is_internal by Facts.is_concealed -- as provided by the name space;
Thu, 29 Oct 2009 14:54:14 +0100 wenzelm tuned;
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