          |           |           |       |
|   1   1   1   |     1     |     1     |     1     |   1   |
|               |           |           |           |       |
o---------------o-----------o-----------o-----------o-------o

With the pictures of the venn diagram and the truth table before us,
we have come to the verge of seeing how the word &quot;model&quot; is used in
logic, namely, to distinguish whatever things satisfy a description.

In the venn diagram presentation, to be a model of some conceptu