Explain this documentation:

Not A Real Software Application
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1. Introduction

This is the documentation for Not A Real Software Application.

Not A Real Software Product will hereby be referred to as NARSA.

1.1. About Document

This documentation serves as an example of how modularity might be applied to text.

Each line includes a single piece of information, being highly cohesive.

Lines are grouped in sections.

Sections are indicated by "number. title", for example 1. Introduction or 1.1. About Document.

This document will be loosely coupled. References to earlier parts of the document will be explicit.

2. Usage

2.1. Notice

NARSA is falseware.

Falseware is a made-up term.

Falseware refers to software which does not exist.

2.2. Running

To run NARSA, run `narsa` at the command line.

The command line option `-a` will enable all-caps mode.

2.3. Exiting

NARSA will automatically exit upon being run.

3. Use cases

As explained in section 2.3, NARSA will automatically exit upon being run.

This is because, as explained in section 2.1, NARSA is not a real software application and does not exist.

4. Licence

This document is licensed under the GNU Free Documentation Licence, which allows users to copy, redistribute, and modify a work, but requires all copies and derivatives to be available under the same license.

Please read <https://www.gnu.org/licenses/fdl-1.3.html> for further information.