Sentence:  Whereas moral relativism deals with matters of "value", <WSD>cognitive relativism</WSD> deals with matters of "fact" (although sharp distinctions may at times be difficult to make) (Hollis and Lukes 1982, p. 2). 
Meaning of the word marked with <WSD> tags:  The claim that the world itself, or the facts about the world, are different for different individuals, or groups, or cultures.