18. The ___ applies the rules to the known facts to deduce new facts.Question 5Answera.Operating systemb.None of thesec.Knowledge based.Inference engin

The correct answer to the question is d. Inference engine.

Explanation

An inference engine is a crucial component of a knowledge-based system. It acts on the rules and known facts within the system to deduce new facts or conclusions. Essentially, it applies logical rules to the knowledge database, allowing the system to reason and make decisions based on the information available.

1. Operating System - This generally refers to software that manages computer hardware and software resources and provides services for computer programs, not specifically related to the deduction of facts.

2. None of these - This option dismisses all other choices, which is incorrect, as the inference engine is a valid term.

3. Knowledge based - While knowledge-based refers to a system that uses a knowledge base, it does not apply rules to deduce facts directly; that role is specifically filled by the inference engine.

Thus, the inference engine is the correct choice as it specifically applies the rules to deduce new facts within a knowledge-based system.