@XanderHenderson Did you try to check your deleted posts? (Searching among your deleted posts is definitely easier for you than for others.)

I have tried some naturally looking searches, such as user:468350 complement or user:468350 url:"wikipedia.org" complement - but I did not see the post you describe.

@MartinSleziak Yeah, I tried both of those with the "deleted" flag. No dice. Perhaps I am imagining it.

It is also possible that I wrote the answer, but never posted it.

Thanks, anyway.