Re: Real constants

[Richard M. Stallman]

     - True constants can prevent some kinds of problems.

      - The Emacs code already uses true constants, like
    `enable-multibyte-characters', and keywords. Was that for
    completeness?

enable-multibyte-characters is not a constant.  It is a special
builtin weird hack.  Keywords are a specific feature.

These were useful in specific ways.  Are user-defined constants
useful in specific ways?

    > Please don't propose new Emacs features for mere completeness' sake.

    Please don't assume you know people's motivations or needs.

No motive was mentioned for adding a primitive to set the flag except
that the flag exists.  That's "completeness' sake".