All of us assume things from our own point of view. It is a natural process that can get us into trouble. A man told me he was in the army and was working base security. I wrongly assumed that he was Military Police and said so to another man who checked it out. I was most embarrassed to discover that I was wrong.
We simply assume that the way we see things is the way they really are. Often we assume that this is the way they should be. Many of our attitudes and behaviors grow out of these assumptions. A Republican experiencing a health funding issue might assume that the “Obama Care” affordable health care law is the problem and will state it that way. A Democrat having the same issue is the problem of insurance companies getting every last cent out of the consumer.
On facebook both the left leaning and right leaning posters produce some of the most outlandish lies about the other party. Because those who agree with the post assume it is correct and repost it on their own time line. Often a simple check of the facts reveals the misrepresentation. There are some extreme true believers who simply don't care if it is a lie as long as it supports their point of view.
Our theory for how things should be is only as good as our assumptions. If the premises are false, our theories have no real scientific status. The only fair criterion for judging the validity of our theory is with the examination of the facts not assumptions. Our ability to confront our own assumptions is not an easy thing to develop and it takes time, effort and dedication to the truth.
Have you checked the facts about your assumptions lately?