I think filtering based on words like "whining" (an emotionally-charged word, for which less emotionally-charged synonyms exist) is the easiest case of a genera

I think filtering based on words like "whining" (an emotionally-charged word, for which less emotionally-charged synonyms exist) is the easiest case of a general problem space that is dominated by hard, and maybe unsolvable, cases. Suppose there are two large groups, whose members loathe each other. The groups are large, so each of them says and does a large number of things. Suppose a news organisation with many viewers publishes articles about both sides which are completely factually accurate and avoid emotionally charged language, but they choose to write only about the things said and done by group A that most people think are good and nice, and the things said and done by group B that most people think are bad, stupid or embarrassing. Is this news organisation biased? Is a particular article by it biased?