There are many different authorities who make knowledge claims. What criteria do you use to distinguish between knowledge, opinion and propaganda?

In our society, with the mass media around us, and with many other sources, we are surrounded by different kinds of information. Then, how much information do we get everyday, from seeing something to actually learning something from the school to listening to a president talking about a country? And how much opinions do you hear, and what kind of propaganda did you observe, and how much of them have become your knowledge? And how did your knowledge and propaganda help you construct your opinion?
Opinion is a person's ideas and thoughts towards something. It is an assessment, judgment or…