Some background, in case the whole backstory there isn't obvious just from the title:
There is in dath ilan a literary custom that if you write an isekai protagonist, and you desire that isekai protagonist to be realistic in a certain sense, then you, the author, don't look up anything that your protagonist would need to just remember without any books or libraries or Network access or experts to consult. Not all isekai protagonists are written to this rule, but some are.
This metaliterary trope is sufficiently established in dath ilan to have its own supporting literary industries. For example, experts you can hire, so that, if you think your protagonist remembers how to synthesize sulfuric acid, the expert will tell you what would happen from the protagonist's perspective inside the story after trying what you write down. Without you, the author, needing to look it up, and thereby contaminating your own memory.
Literally nobody remembers a time when this metaliterary trope has not existed; it's the sort of thing that was instantly reinvented after even the second stage of the Great Screen. It isn't named after anyone any more than the first hundred integers are said to have been discovered by somebody. If there was a point in dath ilani history when this trope was coined, it's long since been forgotten.