(delirious)

Deciding which way round to print the question mark wasn't as straightforward as you might think, incidentally. In its traditional orientation, with the curve to the right, it appears to cup an ear towards the preceding prose, which seems natural enough, though perhaps only because that's how we are used to seeing it. But people have always played around with it. In the 16th century the printer Henry Denham had the sophisticated idea of reversing the mark when indicating a rhetorical question (to differentiate it from a direct question), but it didn't catch on.