In mathematics, what is deductive reasoning? Please give an example.

Deductive reasoning is divided into three steps.

Major premise, minor premise, conclusion

The major premise is the general principle (law), that is, the abstract result of generality and unity; Minor premise refers to individual objects, which is reasoning from general to individual, from which conclusions can be drawn.

If you want to give an example, is the concept unclear?

It's actually quite simple. Give a less elegant example.

major premise

——

Universal principle

——

1 The class is all boys.

Small front topic

——

Single object

——

You are also in 1 class.

conclusion

——

You are a man, too.

That's it, O(∩_∩)O~