The outspoken syllogism is a kind of deductive reasoning, in which all premises are outspoken propositions. All animals will die. Everyone is an animal. So, everyone will die. The first two propositions are called premises. If this syllogism holds, these two premises logically contain the last proposition, which is called the conclusion. The truth of the conclusion is based on the truth of the premises and the relationship between them: the middle term must be GAI in the premises at least once in order to form the connection between the subject and the predicate in the conclusion.
Even if the truth syllogism is valid, if the premise is false, the conclusion may still be false. In syllogism, the predicate in the conclusion is called the big word (P, or the big word item), and the premise containing the big word is called the big premise; The subject in the conclusion is called a small word (s, or a small item), and the premise containing a small word is called a small premise.
The validity of outspoken syllogism;
It will be very lengthy and time-consuming to consider the validity of various blunt syllogisms. Fortunately, predecessors have come up with three alternative methods to find out the effectiveness. One way is to remember all the equations listed in the next chapter. The effective form can also be obtained by constructing Venn diagram. Because there are three terms, venn diagram needs three overlapping circles to represent each category. First, build a circle for the event. The circle adjacent to the secondary event is the circle that overlaps with the primary event.
Above these two circles is the circle of the middle term. It should overlap in three places: events, events and where events overlap with events. A syllogism is effective, and its necessary condition is that the conclusion is true by explaining two premises. Never draw a conclusion, because the conclusion must be deduced from the premise. Always illustrate the full name proposition with examples first. This is achieved by adding shadows to areas where one class has no members in another class.