I use the putlocker test to determine if/when a search engine ceases to provide useful results. If a search for putlocker only yields .com domains and the like,

I use the putlocker test to determine if/when a search engine ceases to provide useful results. If a search for putlocker only yields .com domains and the like, it no is longer prioritizing the most useful results. Google long ago stopped returning useful results for my academic research. For example, it never returns Wikipedia articles unless I explicitly use Wikipedia as a keyword, which I now have to do for most of my searchers.