An attempt to answer that: In English, mixing ?! at the end of a question is a way of indicating bewilderment. Like "What was that?!"
I think that is uncharitable. The question ("Did you choose the legacy C trigraphs over || for aesthetic purposes?") makes perfect sense to me. I think context makes it reasonably clear that the answer is 'yes,' but that doesn't mean that the question doesn't make sense, only perhaps that it didn't need to be asked.
FWIW the ??!??! double trigraph as error processing is funny because of the meaning of ?! and various combinations of ? and !. It is funny and it has trigraphs. That’s the whole point.
But I am free to be curious and ask the author why he choose it! We are not computers but human beings! There is no HN rule that says that I cannot be curious and asks a question that arised from a thread but it is not connected to that! [1].
[1] https://www.iflscience.com/charles-babbage-once-sent-the-mos...
They chose it because the discussion is about trigraphs. It is not a particularly surprising choice to talk about trigraphs in that context.
> There is no HN rule that says that I cannot be curious and asks a question that arised from a thread but it is not connected to that!
I did not write that you did not follow HN rules, just that your question was very strange in the context. I did not downvote you, but I understand why some people did. Your question was a bit passive agressive, even if you did not mean it.
I gave the question a +1 because I, as previously stated, read it to be genuine curiosity. Maybe a smiley would’ve helped, I don’t know. ¯\_(ツ)_/¯
[1] https://journals.linguisticsociety.org/proceedings/index.php...
Your comments seem to suggest your reading was “one of my favorite trigraphs [to use is]”, which is understandable as a valid interpretation.
The whole of this chain of comments is a misunderstanding on the original comment’s ambiguity.