9.9.5 Descriptor

Definition

A descriptor is a designator which is a conceptual graph. The conceptual graph is said to describe the referent.

Examples

Here is an example:

   [PartyLight: [PartyLight]->(Chrc)->[Color: Blue] ]-
      <-(Agnt)<-[Blink]
   "There is a party light, 
      which can be described as 
        a partylight 
           having a characteristic 
             which is a color 
                which is blue, 
    and the party light
      is the agent 
      of blink.".
   "A blue party light is blinking."

Another example:

   [Proposition: [Man: ]->(Attr)->[Mortal] ]
   "There is a proposition, which is 'All men are mortal'"

As we see, the conceptual graph

   [Man: ]->(Attr)->[Mortal]

fills the slot of the referent of the concept with the type "Proposition". This conceptual graph is the descriptor.

Blank designators

A blank designator is taken as a descriptor which is a blank conceptual graph. Thus it says nothing about the referent.

Blank designator, blank quantifier

If both the quantifier and the designator are blank, it simply means "There is a", e.g.:

   [Cat]
   "There is a cat"

   [Mortal]
   "There is a property, Mortal"

Blank designator, non-blank quantifier

We can also have a non-blank quantifier with a blank designator:

   [Man: ]
   "All men"

   [Number: @18]
   "There are 18 numbers"

Here, the quantifier is "" and "@18" respectively, while the designator is a descriptor which is a blank conceptual graph.

Next

Next, we give a summary which will hopefully help you get the big picture of referents.


Prev: 9.9.4 Locator
Up: 9.9 Referents (optional)
Next: 9.9.6 Summary