Hardly seems to address the problem stated in the article, as a search for "BP" on duckduckgo contains _only_ investment-related information, nothing about the oil spill. At DDG you are in a filter bubble, it's just not _your_ filter bubble. It's someone else's filter, presumably the collective bubble of the engineers at DDG's incredibly lackadaisical and tragically understaffed search quality department.

That's not really the kind of bubble being talked about, and there are good arguments why a search engine should at least have some knowledge of search history to implement conversational search and better understand what the search terms mean in context.

If I just searched for "apple pie recipes", and my next query is "where to buy apple", I don't want to see a link to Store.apple.com