# 7:30 pm 10/30/97
# Richard H. McCullough
# Context in Knowledge Representation and Natural Langauge
# AAAI 1997 Fall Symposium, MIT, Nov. 8-10

1. knowledge
is an identification of a fact of reality,
using words and sentences.

example:
	I isa person.

2. context of a sentence
is the knowledge required to understand the sentence.
i.e., context is the closure on undefined concepts,
terminating with axiomatic and perceptual concepts.

	person isa entity.
	entity isa existent.

	I do identify existent.
	identify isa action.
	action isa characteristic.
	characteristic isa existent.

	knowledge := I do identify existent.
	word means existent.
	sentence means relationship.
	relationship isa characteristic.

3. concept-hierarchy
is the knowledge unit, identified by view.

	at view=v_I
	existent
	    entity
		person
		    I
	    characteristic
		attribute
		action
		    identify
		relationship
		    "knowledge := I do identify existent"
		    "existent ise entity,characteristic"
		    ...

4. common knowledge

	at view=v_I
	I is "Dick McCullough".
	I has birthday=1936/10/28.

	at view=v_common
	"Dick McCullough" isa person.
	"Dick McCullough" has birthday=1936/10/28.

5. event
is the change unit, identified by space,time.

example:
	at space=home, time=5pm
	I do move=moving.
	moving changes car from space=street to space=garage.