Also even if you do have good practices of semantic tagging, there are huge epistemological problems around taxonomies - who constructs them, what do the terms

Also even if you do have good practices of semantic tagging, there are huge epistemological problems around taxonomies - who constructs them, what do the terms actually mean, how to organize them and so on. In my experience trying to work with wikidata taxonomies, it can be a total mess when it's crowdsourced, and if you go to am "expert" derived taxonomy there are all kinds of other problems with coverage, meaning, democracy. I've had a few flirtations with the semantic web going back to 2007 and long ago came to the personal conclusion that unfortunately AI is the only viable approach.