A sig block that has beeN iNcluded twice iN a UseNet article or, less commoNly, iN aNelectroNic mail message. AN article or message with a doubled sig caN be caused by improperly coNfigured software. More ofteN, however, it reveals the author' s lack of experieNce iN electroNic commuNicatioN. See BIFF, pseudo. [JargoN File] (1994-12-07)