Interrobang
Isn't reading a book the international symbol for "don't talk to me"? So, if you were say, eating your lunch and reading at the same time, don't you think that the people (person) around you would realise that means to leave you alone and not talk to you? And, don't you think, if they kept talking to you and you just non-committally said "uh-huh" a lot, while still staring at your book, that they would get the hint and give up and leave you alone?
Just checking.
Just checking.