text: The same applies to this a little bit because the persons background could enable them to have an advantage or disadvadtage to knowing the subject on which they are being asked about. Some people have heard things that others havents. Then some people could see things that everyone else missed. It's like a puzzle and each piece of advice you get from one person is a puzzle piece. You can't just solve the puzzle with one piece. So they have to help by giving their piece of say in the matter.