[QUOTE=" Hadron"]\nExcept thats nonsense since people can vary their posting style based on\nany and all criteria : even down to the time of day! and with a\nprogrammable system like Emacs/gnus it could be based on something as\ncrazy as the air pressure that minute! ;)[/QUOTE]\n\nThere are some characteristics of language use that can be very hard to \ndeliberately alter -\- particularly with the (generally low) amount of \neffort someone is likely to put into writing Usenet posts. Things like \nthe frequency with which specific words are used over a statistically \nsignificant text sample, for instance.\n\nI don't know about off-the-shelf software for doing this sort of \nanalysis, but techniques like these have been use to help determine \nwhether to ascribe particular writings to particular historical authors, \ne.g. the "Were all of Shakespeare's plays really written by one man?" \nquestion.