/ / What is deduction? Deductive reasoning

What is deduction? Deductive reasoning

With the help of deduction, the truth is revealed as innatural sciences, and in everyday life. People use the ability to logically reason that in a general sense it is deduction in everyday life, at work, in games and other non-science related activities. Investigates these processes science logic. Deduction is based on the isolation from the general judgments of the particular by means of logically processed inferences. For a better understanding of the subject of discussion, it is necessary to understand what deduction is and explore all the points connected with it.

inference logic

What is inference?

First you need to figure out what isinference. Logic regards this concept as a form of thinking in which from several messages (forms of judgments) a new judgment is born (that is, a conclusion or a conclusion).

For example:

  1. All living organisms consume moisture.
  2. Absolutely all plants are living organisms.
  3. Inference - all plants consume moisture.

So, the first and second judgment in this example isthis is the promise, and the third is the conclusion (conclusion). The incorrectness of one of the messages can lead to a false conclusion. If the messages are not related, the conclusion cannot be made.

Inference is divided into indirect and direct. The latter conclusion is made from one send. That is, they are transformed simple judgments.

In mediated inference, the analysis of several messages leads to the formation of a conclusion. Such conclusions are divided into three types: deductive, inductive and conclusions by analogy. Consider each one of them.

Deductive reasoning

Inference based on deduction provides for a special case of a general rule.

deductive reasoning

For example:

  1. Monkeys love bananas.
  2. Lucy is a monkey.
  3. Inference: Lucy loves bananas.

In this example, the first message is a common one.as a rule, in the second - a particular case is included in the general rule and, as a result, on this basis a conclusion is made regarding this particular case. If all monkeys love bananas, and Lucy is one of them, she loves them too. The example clearly explains what deduction is. This movement from the larger to the lesser, from the general to the particular, in which the aspect of knowledge narrows, provoking a reliable conclusion.

Inductive inference

The opposite of deductive is inductive inference, in which a general pattern is derived from some particular cases.

deduction logic

For example:

  1. Vasya has a head.
  2. Petit has a head.
  3. Kolya has a head.
  4. Vasya, Petya and Kolya are people.
  5. Inference - all people have a head.

In this case, the first three sends are private.the cases summarized by the fourth under one class of objects, and the inference speaks of a general rule for all objects of this class. Unlike deduction, in inductive conclusions the argument goes from the smallest to the largest, from the particular to the general, therefore, the conclusions are not reliable, but probabilistic. After all, transferring special cases to a general group is fraught with errors, since in any cases there may be exceptions. The probabilistic nature of induction is, of course, a minus, but there is a huge plus in comparison with deduction. What is deduction? This is a judgment that works to narrow the knowledge, to specify it, to analyze and analyze known facts. Induction, on the contrary, leads to the expansion of knowledge, the creation of something new, the synthesis of new conclusions and judgments.

Analogy

The following type of conclusions is based on an analogy, that is, the similarity of objects among themselves is evaluated. If objects are similar in any signs, their similarity in the others is allowed.

what is deduction

An example of conclusions by analogy can servetesting of large vessels in the basin, in which their properties are mentally transferred to the open waters of the seas and oceans. The same principle is followed when studying the properties of micromodels of bridges.

It should be remembered that the conclusions of the analogy, like inductions, are probabilistic.

What is the benefit of deduction?

Как уже говорилось в начале статьи, дедуктивное the conclusion can be made by any person in the process of life, and such conclusions affect many areas of life in addition to scientific. The deductive way of thinking is very useful for law enforcement, investigative and judicial officials (for the “Sherlock” of modern times).

deductive reasoning

Но чем бы человек ни занимался, дедукция always useful. In her professional activity, she will make the most rational and competent farsighted decisions, in her studies, to master the subject more quickly and more thoroughly, and in everyday life, it is better to build relationships with people and to understand others.

Deduction development methods

Many people nowadays tend to self-development and, as a rule, come to understand the importance of having high-quality deductive thinking. How to develop deduction?

develop deduction

The development of deduction can contribute to special games, as well as the introduction of a new way of thinking in everyday life. Basic tips on its development can be put together in the following blocks:

  1. Awakening interest. Any material that is being studied should be of interest. This will allow to better understand all the details of the subject and achieve the desired level of understanding.
  2. Depth of study. It is impossible to study subjects superficially, only a thorough analysis will give a positive result.
  3. Wide horizons. People with developed thinking often have knowledge in many areas of life - culture, music, sports, science, etc.
  4. Flexibility of thinking. What is deduction without thinking flexibility?This is a virtually useless attribute. To develop such flexibility, it is necessary to try to bypass all the recognized ways and schemes, to find new aspects of the vision of the question, which will prompt the right and sometimes unexpected decision. A critical approach to even the most ordinary and familiar situations will allow you to make the best and, most importantly, independent decision.
  5. Combination. Try to think at the same time in different ways - combine inductive and deductive reasoning.
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