"Why is my subject search for 'Gender expression' turning up so many titles on aerodynamics?" I was wondering just now, until I realized the most likely explanation was some catalog update process had done a pattern search-and-replace on "Drag" as a subject without checking the results.

(Seen in a HathiTrust subject search. Most likely not their fault, as they take records from partner libraries pretty much as they get them.)

@JMarkOckerbloom oh I'd be interested in the search URL if it's shareable

@platypus It's https://catalog.hathitrust.org/Search/Home?lookfor=%22gender+expression%22&searchtype=subject&ft=ft&setft=true. (Note that the search is limited to "Full view". The "All items" search, without that limit, seems to turn up more relevant hits on average.)

Taking a bit of a closer look at the metadata on these, I'm wondering if instead of a pattern substitution, it was one of those "auto-assign subject headings based on a keyword scan" processes in many of the cases.

Catalog Search Results | HathiTrust Digital Library

@JMarkOckerbloom cue bans on aerodynamics books in 5, 4, 3, ...

TBH, I fully expect the current regime to make teaching the equal transit time theory (the obsolete and very wrong theory of how airfoils work) mandatory because they can

@scruss I was in fact trying to increase my coverage in subjects that were targeted for censorship in DoD-run libraries last year. Though this case inadvertently illustrates one of the increasingly frequent ways censorship happens these days: instead of blocking content outright, drown it out with noise so people don't find it who might otherwise.....
@JMarkOckerbloom Okay so we measure the skill of a cross-dresser by the coefficient of drag?
@JMarkOckerbloom In which case Bryon Noem is almost frictionless.
@JMarkOckerbloom I have a perhaps related anecdote. Several years ago, I was trying to organize a billiards party, but trying to search for materials for it failed because the search engine decided that billiards and pool are synonyms so I must want to search for pool parties. And adding "-pool" didn't help since a lot of sites that talk about billiards also talk about pool.