tangor - 4:19 am on May 14, 2010 (gmt 0)
Wrestling with a pig is fun for the pig and everyone gets dirty.
When having a discussion where issues grow heated, the time to stop is when ad hominen attacks or strawman logic is inserted. These cannot be "won". More importantly, the time expended to have the last word might be better employed with others in discourse that is both pleasant and illuminating.