Does deductive reasoning uses specifics observation to make generalizations?

No, deductive reasoning does not use specific observations to make generalizations; rather, it starts with general principles or premises and applies them to specific cases to reach a conclusion. For example, if we know that all humans are mortal (general principle) and that Socrates is a human (specific case), we can deduce that Socrates is mortal. This process is the opposite of inductive reasoning, which involves making generalizations based on specific observations.