How to Confidently Control Conversations

Have you ever asked someone a question and they answer based on why they think you're asking, but they don't actually address the reason that you're really asking? For example: let's say you're car shopping and you ask the car salesman the length of a car before buying it. They may assume it's because you are worried about the space in the back because you have kids, so they answer based on that assumption. When in reality, you may just need to make sure it'll fit in your garage. If they wo...