e to try and flesh out Peirce's intensional description
of a typical sign relation in the materials of concrete extensional examples.
Think of the theory of sign relations as a subject like algebra, or geometry,
or more concretely, group theory, or graph theory.  Most concretely, perhaps,
you might think of it in terms of relational databases, where sign relations
would be represented as a particular variety of three-column relation tables.

| No. 12.  'On the Definition of Logic'.
|
| Logic is 'formal semi