Using concrete, perceptually based representations to avoid the frame problem*
Scott B. Huffman, John E. Laird · 1992
Real-world planners must be able to temporally project their external actions internally. Typ-ically, this has been done entirely at an ab-stract representational level. We investigate an alternative approach, performing projections on a concrete, property-based representation, and re-deriving the abstract level from it. We show that this approach can greatly alleviate the frame prob-lem in certain types of spatial domains, while maintaining the advantages of planning at an ab-stract level. We present a comparison of the ap-proaches in various object-manipulation domains, including the results of a re-implementation of the Robo-Soar system [Laird et al., 1989].