Keith Houston is an expert on the subject of punctuation. He wrote the standard work ‘Shady Characters’, describing the history of all kinds of punctuation marks and typographic symbols. Among them are the interrobang, hashtag, ampersand and several irony marks. Recently, he published an article on his blog about the jè-mark: “Sander Neijn­ens’ jè mark, a ty­po­graphic shrug — “so what?” — or irony mark, made with un­com­mon care and at­ten­tion, and just wait­ing for you to take it up’.