The interrobang ⟨‽⟩ is undoubtedly an unconventional punctuation intended to mix the interrogation issue (or even the issue mark) and the bang (printer's slang for exclamation mark) into a person symbol, accustomed to denote a sentence which is both a matter and is also exclaimed. Example of ligatures. Picture by https://connollykeyjointsystemsyd90851.activoblog.com/27488751/bondek-slab-sydney-things-to-know-before-you-buy