text: First and foremost my first point is that you can compare opinions with others. You can see if people have better or improved version of your idea. Take for example if you wanted to figure out what to buy at store but you only had ten dollars to spend, and can't decide what you want to buy. You go and ask people who you know, and one of your friends gives you a good idea and says to buy something worth five dollars save the rest instead of wasting all of it. This one example for this reason, however their are multiple different ways this could go and millions of different scenarios. Next you can see if you have good judgement. Say for example if you go to multiple people and whenever you guys compare ideas they tell you that's also a good idea. That mean you have good judgement since the people who you are comparing advice with think your idea is still good, and if people when you do exchange opinions say that your's is really good than you might as well have good judgement over those types of things. You can see if your opinions are similar. Say for example you want to go somewhere for vacation, so you decide to ask your friends where you should go. You vaguely have an idea of that you want to go to England but your not sure, so go out and ask friends for their opinions. Some of them tell you to go somewhere they is think is nice, while good portion of them tell what you where you thought about going. Since the people around you thought of the similar place you wanted to go you resolute yourself to go there. In that scenario it makes most sense to go since not only majority thought so, you were already thinking about going to there.