Using Full-Text Searching
Every full-text search engine I know that offers filtering offers machine filtering. That means instead of having humans filter the search results, the results are filtered by computers. These filters are pretty good, but they are not perfect. While I appreciate filters to help eliminate results I find distasteful, I do not trust them to remove all prurient results from my searching. And you shouldn't either: machine-filtered search results aren't perfect.
If you want a strong assurance that you're not going to run into any search results that'll make your head hurt, I recommend against using full-text search engines and instead focusing on human-built search indexes, which we'll get into later in this chapter. If you ...
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