The page I linked shows examples like two tweets from the same author where tweet A says "Thanks" and B says "Thanks, sista" and B is marked offensive while A i

The page I linked shows examples like two tweets from the same author where tweet A says "Thanks" and B says "Thanks, sista" and B is marked offensive while A is not. You're absolutely right that finding things "offensive" is a complex, ambiguous, and subjective problem. But Twitter isn't even good enough to be failing at that stage. They are basically marking things offensive at random. It's like - if you said quantum physics was challenging because of all the math, difficulty doing practical experiments, and changing understanding of the universe - all that is probably true. But Twitter is down the hall eating paste, not grappling with those lofty problems.