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Chapters 3 & 4 SynopsisChapters 3 & 4 SynopsisI believe the presumption of an outside(a) reality is the assumption that there is a real human beings that is external to our object and senses, and that it exists whether or non we as observers exist, and whether or not we be observing it. This assumption merchant shipnot be proved because all of our perceptions, without exception, are moral images, and we have no means to go beyond our mental images. It is one we all commonly look at without even thinking approximately it. In the military, we assume the office and the computer in it are there after we leave work at the end of the day and allow for be there when we arrive at work in the morning. When we flip home at the end of the day, we assume that our house or flat will be there when we arrive, and that it continued to be there in our absence after we left in the morning. We assume that our friends, relatives, and acquaintances are there whether we can see and talk to them or not, and whether or not we are thinking about them. We assume that our parents existed before we were born, and that many of the people we go to bed will be alive after we die. So many of our free-and-easy checks repeatedly confirm this assumption that nigh of us hardly inquiry it. It is an assumption that has enormous survival value we know that a rush car can kill us while we are cut through the street absorbed in our thoughts and unaware, that a stray bullet can instantly obliterate our consciousness without warning, or that we can die from an external agent such as a virus, a bacterium, or a poison. The assumption of external reality is necessary for science to function and to flourish. For the most part, science is the discovering and explaining of the external world. Without this assumption, there would be only the thoughts and images of our own mind (which would be the only existing mind) and there would be no hold of science, or anything else. In addition to the assumption of an external reality, we in any case make the assumption that this reality is objective. This is repeatedly confirmed by our daily experience as well as by scientific observations. I also learned that objectivity means that observations, experiments, or measurements by one mortal can be made by another person, who will moderate the same or similar results.