Deduction describes the process of deriving new, logically sound conclusions on the basis of already known and accepted facts, assertions and assumptions. Conclusions arrived at through deduction tend to be less known, special, new and forward looking as well as definite, not just probable.
Application of deduction in practice: Along with induction, deduction belongs among the fundamental thought processes applied in the discovery of new relationships and rules. Deduction is used in science; in the analysis of rules and in testing general hypotheses. A number of methods in quality, risk and security management take advantage of deduction when assessing facts and actualities. Deduction helps to find out if a certain hypothesis is capable of explaining a certain fact under investigation and if it has general validity. Deduction is significant only as a link in a chain of mental processes and it is necessary to apply this procedure in conjunction with other thought and derivational methods. (see Kolb´s experimental cycle).
Deduction is also an indivisible aspect of the so-called deductive sciences like logic and mathematics.