y of a set.
    The elements of a relation in intension are known
    as "elementary relations".  These are the analogues,
    in intension, of the tuples in extension.

For the past many years, all against my first inclinations,
I have been working to develop the extensional side of the
theory of sign relations, simply because this area is less
crowded, because far less work has been done on this face
of the mountain, and because this is the side of things
that makes a connection with empirical efforts, sa