For the following two questions, consider this Prolog program:person(mary).person(john).girl(mary).boy(john). **Task: Converting a Prolog Program to Clause Normal Form (CNF)****Instruction**: Write the prolog program in Clause Normal Form (CNF).**Explanation**:In Prolog, Clause Normal Form (CNF) involves expressing a logical formula in a conjunction of disjunctions. When converting a Prolog program to CNF, each statement (or Horn clause) should follow this structure:1. **Basic Structure**: A Horn clause in Prolog typically has a head and a body. - The general form of a clause: - `head :- body.`2. **Clause Representation**: - In CNF, each clause should be represented as a disjunction of literals. In Prolog, this typically corresponds to: - Conjunctions of implications or facts. - Each individual statement can often be translated into a series of logical implications or conjunctions to fit CNF requirements.3. **Translating to CNF**: - Ensure that all logic within the Prolog program: - Is broken down into simpler conjunctions or implications. - Each clause is converted into a series of disjunctions formatted correctly. - Work through logical simplifications to express complex logical statements as CNF.**Objective**: Proper conversion will allow logical statements to be easily parsed and utilized by logical inference engines, supporting automated reasoning capabilities within educational systems. During the process of answering the previous query (?- person(X), \+ girl(X).), did X unify with "john" at some point?- ○ True- ○ False

Answered: During the process of answering the…

During the process of answering the previous query (?- person(X), \+ girl(X).), did X unified with "john" at some point? True False

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

For the following two questions, consider this Prolog program:

person(mary).

person(john).

girl(mary).

boy(john).

**Task: Converting a Prolog Program to Clause Normal Form (CNF)**

**Instruction**: Write the prolog program in Clause Normal Form (CNF).

**Explanation**:

In Prolog, Clause Normal Form (CNF) involves expressing a logical formula in a conjunction of disjunctions. When converting a Prolog program to CNF, each statement (or Horn clause) should follow this structure:

1. **Basic Structure**: A Horn clause in Prolog typically has a head and a body.
- The general form of a clause:
- `head :- body.`

2. **Clause Representation**:
- In CNF, each clause should be represented as a disjunction of literals. In Prolog, this typically corresponds to:
- Conjunctions of implications or facts.
- Each individual statement can often be translated into a series of logical implications or conjunctions to fit CNF requirements.

3. **Translating to CNF**:
- Ensure that all logic within the Prolog program:
- Is broken down into simpler conjunctions or implications.
- Each clause is converted into a series of disjunctions formatted correctly.
- Work through logical simplifications to express complex logical statements as CNF.

**Objective**: Proper conversion will allow logical statements to be easily parsed and utilized by logical inference engines, supporting automated reasoning capabilities within educational systems.

During the process of answering the previous query (?- person(X), \+ girl(X).), did X unify with "john" at some point?

- ○ True
- ○ False

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