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Chapters 3 & 4 SynopsisChapters 3 & 4 SynopsisI believe the assumption of an outside(a) domain is the assumption that thither is a real world that is impertinent to our head word and senses, and that it exists whether or not we as observers exist, and whether or not we are law-abiding it. This assumption johnnot be proved because whole of our perceptions, without exception, are mental images, and we gravel no means to go beyond our mental images. It is one we all comm tho make without even thinking about it. In the military, we scoop up the office and the computer in it are there by and by we draw a blank work at the end of the day and will be there when we arrive at work in the morning. When we head home at the end of the day, we assume that our house or apartment 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 contact 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 know will be alive after we die. So many of our everyday experiences repeatedly patronize this assumption that most of us hardly question it. It is an assumption that has terrific survival value we know that a speeding car can kill us while we are crossing the street take up in our thoughts and unaware, that a stray bullet can instantly kill our consciousness without warning, or that we can die from an external agent such(prenominal) as a virus, a bacterium, or a poison. The assumption of external domain 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 need of science, or anything else. In addition to the assumption of an external reality, we also make the assumption that this reality is objective. This is repeatedly confirmed by our daily experience as tumefy as by scientific observations. I also learned that objectivity means that observations, experiments, or measurements by one person can be made by another person, who will obtain the same or similar results.