.. _writing-precisely.foundation.closed-term-system:
.. _perspective.672:

------------------------------------------------------------
[Foundation] Closed Term System
------------------------------------------------------------

When describing to AI your intention—requesting information
or building a software system—you have to be specific. Not
because artificial intelligence is not intelligent enough,
but because lack of precision leaves room for
interpretation, assumptions, ambiguity and many other evils
that lead the intended product to failure. So, specificity
matters.

Written as a Product, Read as a System
============================================================

`Precise writing` is a *discipline of constructing text*,
and in this discipline text is both a product and a
system. To obtain a product, the author applies correct
methods in the correct order. An idea that exists in the
mind acquires a verbal structure and eventually becomes a
coherent text. The author reasons about text as a sequence
of sentences that reveal aspects of the idea.

When text is ready, the way the reader reasons about it is
different. When comprehending the ideas from text, the
reader need not remember the actual sentences. The reader
reconstructs the relations among the ideas. A well written
text makes these relations conspicuous. In it, no idea is
loose and no relation is missing.

To make this interpretation practical, `precise writing`
operates on *terms*, not ideas. The reason is that *terms*
must be defined, such that readers do not substitute their
own understanding for what is actually meant in text.

Closed by Design
============================================================

Let's scale up to a collection of texts that contribute to a
predefined purpose, such as defining a software system:
conceptual design, architecture definition, definitions of
components, use cases. If these texts form one system of
terms where all terms are defined through relations and no
term is left undefined or unrelated then all reasoning will
happen strictly within this system. Indeed, to reason about
something one needs well defined terminology otherwise the
reasoning is unpredictable. When every term is defined
through the terms of this system and no definition reaches
outside it, the system is closed.

Constructing closed systems is not an easy task. It requires
formal methods and tools—that is, discipline—for authoring,
when text is produced as a system of logically dependent
sentences, and for analysis, when text is reconstructed as a
system of terms.

Closed System: Communication Model
============================================================

A successfully constructed closed system leaves no room for
frivolous interpretation. In it, specificity is not a
problem any more because *specific* is an inherent property
of every term.

Within a closed term system, communication is happening on
another level: AI does not have to wait for a human to provide
details of the system. After a human introduces the idea and
formulates the problem or the desired state, whatever the
closed term system is designed to be initialized with, a human
interacts with AI via the formal texts that define the
system. This effectively makes it an interface between a
human and AI.

------------------------------------------------------------

   :version: 1.0
   :revision: 2026-09-25
   :written.by: |author|

.. include:: ./variables/names.txt