I see the interrobang mentioned on this EL&U question from six-and-a-half years ago. However, the answers there treated it generally as a distant novelty. I seem to come across !?, ?!, ?!?, and !?! quite regularly these days (at least on the Internet!?) Reading the SE answer, it wasn't clear whether they were specifically addressing the special ‽ character (which I too have never come across) or the entire concept [due to the singular nouns they used, maybe the former??]
I'm wondering if its usage has increased/become more accepted over the years, and whether forms like !? may be applied to convey bewilderment in any settings outside Internet discussion or fictional speech. My primary interest is in transcription/caption forms that have very little addition of nonverbal communication (though it could be important in other writing as well, such as quoting someone in journalism). If not, are there any other formal methods for conveying the speaker's bewilderment???
I had pretty limited success on Google (perhaps because it's hard to differentiate between the special symbol and the grouped punctuation marks?)
While you're doing that, please include specific rules for every possible situation.
– Robbie Goodwin Jun 13 '17 at 21:41