 but it was not meant as a formalization, but as a
    clarification, as in diagramming a sentence.

|   EXTERNAL OBJECTS ____ WE FORM FOR OURSELVES ____ IMAGES, SYMBOLS, OR PICTURES
|         |                                        / [SIGNS, BRAIN STATES, WHATEVER]
|         |                                       /                  |
|         |                                      /                   |
|   [NATURAL LAWS]        . . . SUCH THAT . . . /    [LOGICAL, MATHEMATICAL MODEL]
|         |        