1. General conditions (or general conditions). This condition is the constraint condition in the topic. This condition is not specific to one element, but valid for all elements. It is a condition that is easily overlooked by candidates, but its role is very important. Such conditions generally limit the number of elements that can be placed continuously in the arrangement questions, the size of each group in the grouping questions, and the number of times that each element can appear in the multiple-choice questions. Such conditions often stipulate the structure and solution of the problem and directly point to the solution in the problem. Some problems are "stuck" because they cannot be solved, often because they forget the "general conditions".

Second, special conditions. These conditions are related to one or several elements in the topic. They directly specify the attributes of some elements or the relationship between elements. These conditions are the starting point to solve the problem and the conditions to be symbolized. There are two kinds of analytical reasoning questions: general conditions (or general conditions) and special conditions. For general conditions, although it is difficult to fully express the meaning of such conditions with simple symbols, there are not many general conditions (generally no more than two) in analytical reasoning problems and they are easy to remember. Therefore, candidates are advised to keep these conditions in mind, or simply write a few Chinese characters instead. For special conditions, candidates can use their customary conditional expressions, but they must pay attention to the following principles:

First, the symbols used must be concise, easy to draw and easy to understand. In order to save time, the simpler and easier the symbols are drawn, the better.

Second, symbols cannot be ambiguous. The symbols used by candidates must be strict, and there can be no two interpretations of symbols. Enumeration is to list all the arrangements that meet the conditions of the topic according to the initial constraints given in the topic and the additional conditions of each topic, and eliminate the arrangements that contradict the conditions of the topic at any time. Enumeration is a reasoning method as widely used as exclusion, because it only needs to be done according to the diagram after enumeration, which is especially suitable for solving the problem of arrangement and grouping.

How to identify the same-sex elements in analytical reasoning and what role do the same-sex elements play in solving problems?

A: The so-called same-sex elements are elements with the same attribute restrictions except for different names. How to determine the same-sex elements?

First, some two or several factors unrelated to the illness are of the same sex;

Second, although conditions are involved, the elements subject to the same conditions are also of the same sex.

The use of same-sex elements can greatly speed up problem solving, and its functions mainly include:

1. Use the same-sex elements to exclude options: Once two of the four options are found to involve the same-sex elements and there are no other restrictions, immediately exclude these options involving the same-sex elements, and then find the answers from the remaining options, thus reducing the difficulty of the question;

2. Same-sex elements are used to determine the sequence position or grouping of elements: when determining the sequence position relationship between two elements, if there is "definitely right" or "definitely wrong", the same-sex elements shall not be selected; If "may be right" or "may be wrong" appears, you must choose the same-sex element; When grouping, two same-sex elements exchange positions without violating the conditions in the topic.

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