>>10219440>it's already been established that "secondary" is a Chinese (hong kong) term and is almost impossible to find on English speaking sites because no one but ignorant foreigners use it.No it hasn't? Just because you haven't come across it before doesn't mean it never existed before now, which I don't blame you for since you don't seem to go on the boards where it is used more often.
Maybe it did originate from Hong Kong, I won't disbute that because I don't know about the origins of slang, but it isn't a new word that "is almost impossible to find on English speaking sites".
Here's a screenshot from desuarchive, I set it to 2017-01-01 and the first use in the context of "not being familiar with a source material" appeared here.
Hell if you want an out of 4chan example Urban Dictionaries listing for the phrase with that context was made in 2019.
https://desuarchive.org/a/search/text/Secondary/start/2017-01-01/order/asc/Also I'm not apart of the circlejerk that baits you into arguments, I want to make that clear, but I just found this whole exchange baffling since it would be like if someone started claiming "based" only appeared within the last year and originates from Brazil.