If you could create a punctuation mark, what would its function be and what would it look like?
I've always liked the chess marks "!?" and "?!" and wondered why they weren't used in standard English. The former refers to a startling move which is uncertain in merit and the latter refers to a dubious move which creates difficult to handle complications.
How would you respond?
Link | Image by flickr user Horia Varlan, used under Creative Commons license