I know this is a joke but it seems unnecessary. Most people actually do use evidence and logic to arrive at their opinions. The problem is some people are presented with incorrect or fabricated evidence. Some people draw incorrect conclusions, or maybe some of the evidence is above their head so they ignore that when it's vital to proper understanding. Some people aren't particularly good at logical thinking, or never progressed past introductory levels.
This is all why you can show identical evidence to a group of people and get multiple, sometimes very different, opinions.
This is all why you can show identical evidence to a group of people and get multiple, sometimes very different, opinions.