that of a special kind.
| Genus, species, difference, property, and accident, are
| the well-known terms of second intention.  These relate
| particularly to the 'comprehension' of first intentions;
| that is, they refer to different sorts of predication.
| Genus and species, however, have at least a secondary
| reference to the 'extension' of first intentions.
|
| Now let the letters, in the particular application of
| Boole's calculus now supposed, be terms of second intention
| which relate exclusively t