text: It is not only voting that makes multiple opinions a necessity, multiple opinions is also very useful for receiving advice from people. If you were walking along the old, dirty, and muggy sidewalk of New York City, and you found someones lost purse laying in some saturated mud, you'd ask someone for advice, to determine where you would bring the purse. Let's say you ask one person, "Where should I bring this purse?" and they respond with, "Bring it to the recipient of the purse." You would take their advice, and try to find the owner of the purse. However, it turns out you could not find the owner of the purse, so you proceed ask another citizen strolling along the sidewalk, "Where should I bring this purse?" The citizen responds with, "Bring it to the lost and found, the employees will take it from there." You then bring the purse to the lost and found, and the employees take care it. In theory, if you only asked one person for advice, you would be scavenging New York City all day looking for this one lady. Since you asked multiple people for advice, you found a solution to your problem, and brought it to the lost and found building nearby.