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. -------