Someone that while 'listening' to your argument, they have already thought of a reply regardless of what is currently being said.
Someone that doesnt pay full attention to the conversation.
You: "Can you tell me what format of longitude/ latitude this GPS device stores its locations?"
Negative Listener: "I'm sorry sir, but you cant search for locations based on longitude/ latitude."
You: "Huh? You appeared to have answered a question I never asked!"
Air hostess: "Would you like the chicken or beef sir?"
Negative Listener: "The fish sounds delicious!"