Partitioned Representations

Cognitive science is a field that began with the realization that researchers in varied disciplines-psychology, artificial intelligence, linguistics, philosophy, formal semantics, neuroscience, and others-had taken on a common set of problems in representation and meaning, in reasoning and language. Nevertheless, cognitive science as a whole enjoys no common methodology or theoretical framework, and is in danger of becoming even more fragmented with time. There are two reasons for this. First, cognitive science is built on existing methodologies that have different historical origins. AB a result, the psychologist's truth is different from the linguist's truth. The artificial intelligence researcher's truth is different from the philosopher's truth. The neuroscientist's truth is different from the formal semanticist's truth. All too often there is little or no recognition of the relevance of work in other disciplines to one's own concerns. Second, cognitive scientists tend to develop theories around isolated problems. For instance, there are theories about how humans categorize concepts, about how humans analyze linguistic expressions syntactically, about how the English tense system works semantically, about how humans reason about space or reason about time, about how goal-directed problem solving occurs, about how the brain computes, and so on.

Inhalt

One: Nuts and Bolts.- 1. Mental Representation.- Symbolism: The Classical Paradigm.- Cracks in the Symbolic Paradigm.- Connectionism: The Other Paradigm.- Methods of Models.- Assessing Theories of Mental Representation.- 2. Partitioned Representations.- General Overview.- The Contents of Spaces.- Parochial Reasoning.- Primary Contexts.- Partitioned Semantics.- Coherence.- Consolidation.- Secondary Contexts.- A Typology of Spaces.- Where Partitioned Representations Get Their Power.- Summary and Conclusions.- 3. Language: Process and Structure.- A Simple Philosophy of Language.- Linguistic Explanation.- The Process of Language Understanding.- Linguistic Evidence for Mental Representations.- 4. Three Levels of Language Processing.- Parochial Processing.- Distribution.- Contextualization.- An Example Discourse.- Conclusions.- Two: Studies in Language.- 5. Pedro's Donkey and Oedipus's Mother.- Some Common Parochial Linguistic Processes.- Some Common Cases of Distribution.- Interaction of Distribution and Parochial Processes.- Summary and Conclusions.- 6. Satisfying Presuppositions in Discourse.- The Problem of Presupposition.- Presupposition and Parochial Processing.- What Happens in Complex Sentences?.- Conclusions.- 7. Space Frogs and Henry Ford.- Linguistic Evidence for Contextualization.- The Semantic Contributions of Space Cues.- Summary.- 8. Temporal Aspect.- Reference Time: Temporal Perspective.- Semantics and Construction.- Reference Time: Contextualization.- The Case of the Present Perfect.- Conclusion.- 9. General Conclusions.- An Assessment of Partitioned Representations.- Prospectus.- The Importance of Partitioned Representations.- Appendices: Formal Models.- 10. A Logic of Partitioned Representations.- The Syntax of PR.- Rules of Inference for PR.- The Semantics of PR.- Soundness.- Conclusions.- 11. Generalized Natural Deduction.- Generalized Natural Deduction.- Time and Action.- Frames.- Summary and Conclusions.- 12. A Computational Model.- The Design of Spaceprobe.- Customizing Digestion.- Restructuring Rules for Distribution.- Handling Queries.- Language Understanding in Spaceprobe.- Summary.- References.- Author Index.