Reviving an old General Semantics proposal: borrowing from scientific notation and using subscripts like 'Gwern2020' for denoting sources (like citation, timing, or medium) might be a useful trick for clearer writing, compared to omitting such information or using standard cumbersome circumlocutions.
Moved to gwern.net
This seems like a solid improvement over X!Y notation. X!Y seems to not fit my brain in the same way that XのY seems to not fit my brain, and mentally substituting “’s” for “の” helps only partially.
A better question, I think, would be this: "When is it worth it to use this one weird trick to boost the clarity of a work?"
It seems worth it in nerdy circles (i.e. among people who're already familiar with subscripting) for passages that are dense with jumping around in time as in your chosen example, but I'd expect these sorts of passages to be rare, regardless of the expected readership.
Also, it's unclear why "on Facebook" deserves to be compressed into an evidential. At the very least, "FB" isn't immediately obvious what it refers to, whereas a date is easier to figure out from context.
Would you say that about citations? "Oh, you only use one source in this paragraph, so just omit the author/year/title. The reader can probably figure it out from mentions elsewhere if they really need to anyway." That the use of subscripts is particularly clear when you have a hairball of references (in an example constructed to show benefits) doesn't m
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