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The only way to not offend a black or white person is to call them a person, as the colour of ones skin shouldn't even apply. It is like describing an overweight person as a fat person, the word "fat" actually can offend, so as the PC brigade is increasing in population, and even "White Christmas" and "Blackboard" and "Bah Bah Black Sheep" are now offensive to to some of the Black population, then the "N" word Ken used has no chance of becoming acceptable. And also "Coloured" is deemed racial. There is no end to this I am afraid...