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http://mathforum.org/kb/thread.jspa?messageID=7896333&tstart=0#7896333
Sep 26, 2012 2:45:43 AMSep 26, 2012 2:45:43 AMhp17020Re: Need help w/ problem
http://mathforum.org/kb/thread.jspa?messageID=7895805&tstart=0#7895805
To show ¬p V ¬q V ¬r = ¬p V (r -> ¬q)

Probably the easiest way to see that the two sides are equivalent is to use the]]>Sep 25, 2012 12:00:14 AMSep 25, 2012 12:00:14 AMjawbrey@att.net0RE: Need help w/ problem
http://mathforum.org/kb/thread.jspa?messageID=7895688&tstart=0#7895688
Alex, Some true logic wonks watch this site. From an amateur's standpoint, two different ideas may be useful: (1) Write up "truth tables"]]>Sep 24, 2012 7:53:15 PMSep 24, 2012 7:53:15 PMbenb1Need help w/ problem
http://mathforum.org/kb/thread.jspa?messageID=7895494&tstart=0#7895494
Sep 24, 2012 1:57:29 PMSep 24, 2012 1:57:29 PMTank8533