Deduction is the cognitive mental process of searching for a reason or a logical explanation for incidents with the aim of understanding or supporting beliefs, or extracting expressions, concepts, actions or feelings in philosophy, the study of inference usually focuses on what makes the deduction process sufficient or insufficient, appropriate or not, good It gives true or false results.

Philosophers conduct this search for the rules of correct deduction, either by examining the form or structure of deduction through arguments, or by considering the more general methods used to reach the goals of deduction.

Conversely, psychologists tend to study how people make deduction and judge, what mental processes contribute to this process, and how deduction affects brain structure.

Conclusion is also studied by mathematicians, artificial intelligence specialists and cognitive scientists usually distinguish between three types of conclusion:

Standard conclusion

Inductive conclusion

Deductive conclusion