I'm wondering if anyone can answer this question: There are characters such
as Question Down, Exclamation Down, Quote Single Base and Quote Double Base,
among others, which seem almost entirely useless to me. What is the history
behind and purpose of these characters in language, and in what
circumstances are they used?
I've never needed to typeset them, and I have never seen them used in any
reading material, even textbooks or technical publications. Is it common
practice to include these characters in display typefaaces?
Australian Type Foundry