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What is "deduction"?
It is a process of drawing specific statements or individual conclusions from the general premise through deduction, that is, "deduction".

The logical form of deductive reasoning is of great significance to rationality because it plays an irreplaceable role in correcting the rigor and consistency of human thinking. This is because deductive reasoning ensures the validity of reasoning not because of its content, but because of its form. The most typical and important application of deductive reasoning usually exists in logic and mathematical proof.

The difference between induction and deduction;

1, the starting point of thinking is different: inductive reasoning is a cognitive process from particularity to generality; Deductive reasoning is a cognitive process from general to special.

2. The nature of the connection between premise and conclusion is different: the conclusion of inductive reasoning is generally beyond the scope determined by premise, and the connection between premise and conclusion is not inevitable, but only probable; The connection between the conclusion of deductive reasoning and the premise is inevitable, and its conclusion is not beyond the scope determined by the premise.

Baidu encyclopedia-deductive method