KALANTARI@RED.RUTGERS.EDU (06/18/87)
R U T G E R S U N I V E R S I T Y
Department of Computer Science
C O L L O Q U I U M
SPEAKER: Paul Rosenbloom
Stanford University
TITLE: ACQUIRING KNOWLEDGE FROM THE OUTSIDE
SOME RECENT PROGRESS ON LEARNING IN SOAR
DATE: Monday, June 29, 1987
TIME: 10:00 a.m.
PLACE: Hill Center, Room 705
In previous work on learning in Soar we have focused on how the chunking of
internal problem solving can acquire the varieties of knowledge required by a
general problem solver; for example, productions can be acquired which perform
operator retrieval, instantiation, selection, and implementation. One major
form of learning not covered by this previous work is the acquisition of
knowledge from external sources. In this talk I will describe two current
projects which are examining how the techniques utilized in the previous work
can be employed to learn from external knowledge sources. The first project is
working on the acquisition of general search control knowledge from external
advice. This work touches on issues of operationalization, learning
apprentices, analogy, and generalization. The second project is working on the
acquisition of declarative knowledge. This work demonstrates for the first
time in Soar what Dietterich termed "knowledge level learning"; that is, the
acquisition of knowledge not already in the system's deductive closure. One
implication of this demonstration is that explanation-based learning mechanisms
are not inherently limited to symbol level learning. Issues that have arisen
during this work include: how to decouple new facts from the context in which
they were learned, how to be able to distinguish what has been learned from
what hasn't, and how to index declarative information for appropriate
retrieval.
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