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Transcript
Vector Symbolic Architectures: Constructions in the Brain Simon D. Levy Washington & Lee University Lexington, Virginia, USA Ross Gayler Baycorp Advantage Value Solutions / LaTrobe University Melbourne, Australia The Appeal of Connectionism (Rumelhart & McClelland 1986) WALKED WALK ROARED ROAR SPOKE SPEAK WENT GO Mary won’t give John the time of day. ignores(mary, john) Language Isn’t (Just) Association: Jackendoff’s Four Challenges for Cognitive Neuroscience Challenge I: The Binding Problem + ? ? ? ? Solution? Local Representations Local Representations Challenge II: The Problem of Two ? Challenge III: The Problem of Variables Challenge IV: Working Memory vs. Long-Term Memory ignores(X, Y) X won’t give Y the time of day. Vector Symbolic Architectures (Plate 1991; Kanerva 1994; Gayler 1998) Binding Binding Bundling + = Unbinding (query) Reduction Composition / Recursion Variables john X Conclusions / Future Work • VSAs address Jackendoff’s first three challenges • Can be implemented as spiking neurons (Eliasmith 2004) • Remaining challenge: constructions (long-term memory) to map from conceptual structure (working memory) to symbol sequences
