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Jim Norton's coming to Bill Maher's defense of the n-word, saying intentions make a difference -- plus, the rules on who can use the word seem kinda arbitrary.

The comedian told us Maher's "house n*****" joke was definitely offensive, but he thinks the rabid backlash ignored the context. Norton points out there are lots of entertainers and artists -- even white ones -- who use the word in their work ... so, why the double standard with Bill?