What is a proof?

[Muslim Scholar]

Then what do you call this?

Deductive Proof

A deductive argument is one in which it is impossible for the premises to be true but the conclusion false. Thus, the conclusion follows necessarily from the premises and inferences. In this way, it is supposed to be a definitive proof of the truth of the claim (conclusion). Here is a classic example:

All men are mortal. (premise)
Socrates was a man. (premise)
Socrates was mortal. (conclusion)

That's deductive logic. Not deductive proof.

It is a deductive proof using deductive logic
The concept is deductive logic
the specific example is a proof (of the conclusion)