A step toward modeling reflexive reasoning

[1]  Denis Trystram,et al.  Parallel algorithms and architectures , 1995 .

[2]  Gordon D. A. Brown,et al.  Neurodynamics and psychology , 1994 .

[3]  Eric L. Schwartz,et al.  Computational Neuroscience , 1993, Neuromethods.

[4]  M. Oaksford,et al.  Computational and biological constraints in the psychology of reasoning , 1993, Behavioral and Brain Sciences.

[5]  S. Thorpe,et al.  Dynamics of orientation coding in area V1 of the awake primate , 1993, Visual Neuroscience.

[6]  M. Oaksford.  Mental models and the tractability of everyday reasoning , 1993 .

[7]  S. Sloman.  Feature-Based Induction , 1993, Cognitive Psychology.

[8]  David A. McAllester.  Automatic recognition of tractability in inference relations , 1993, JACM.

[9]  N. Chater,et al.  Logicism, Mental Models and Everyday Reasoning : Reply to Garnham , 1993 .

[10]  A. Garnham.  Is logicist cognitive science possible , 1993 .

[11]  S. McRoy.  Abductive interpretation and reinterpretation of natural language utterances , 1993 .

[12]  Paul F. Dietz,et al.  A Lower Bound Result for the Common Element Problem and Its Implication for Reflex ive Reasoning , 1993 .

[13]  Michael J. Swain,et al.  Arc Consistency: Parallelism and Domain Dependence , 1992, Artif. Intell..

[14]  S. Grossberg,et al.  A self-organizing neural network for supervised learning, recognition, and prediction , 1992, IEEE Communications Magazine.

[15]  Stephen Grossberg,et al.  Fuzzy ARTMAP: A neural network architecture for incremental supervised learning of analog multidimensional maps , 1992, IEEE Trans. Neural Networks.

[16]  D. Perrett,et al.  Time course of neural responses discriminating different views of the face and head. , 1992, Journal of neurophysiology.

[17]  M. Oaksford,et al.  Reasoning with conditionals containing negated constituents. , 1992, Journal of experimental psychology. Learning, memory, and cognition.

[18]  I. Biederman,et al.  Dynamic binding in a neural network for shape recognition. , 1992, Psychological review.

[19]  Stephen Grossberg,et al.  Working memories for storage and recall of arbitrary temporal sequences , 1992, [Proceedings 1992] IJCNN International Joint Conference on Neural Networks.

[20]  N. Chater,et al.  Bounded Rationality in Taking Risks and Drawing Inferences , 1992 .

[21]  Philip R. Cohen,et al.  Intentions in Communication. , 1992 .

[22]  M. Tovée,et al.  Oscillatory activity is not evident in the primate temporal visual cortex with static stimuli , 1992, Neuroreport.

[23]  W. Singer,et al.  Oscillatory Neuronal Responses in the Visual Cortex of the Awake Macaque Monkey , 1992, The European journal of neuroscience.

[24]  T. Wiesel,et al.  Receptive field dynamics in adult primary visual cortex , 1992, Nature.

[25]  Stephen Grossberg,et al.  Working Memory Networks for Learning Temporal Order with Application to Three-Dimensional Visual Object Recognition , 1992, Neural Computation.

[26]  Ichiro Tsuda,et al.  Dynamic link of memory--Chaotic memory map in nonequilibrium neural networks , 1992, Neural Networks.

[27]  Paul R. Cooper,et al.  STRUCTURE RECOGNITION BY CONNECTIONIST RELAXATION: FORMAL ANALYSIS , 1992, Comput. Intell..

[28]  S. Grossberg,et al.  Neural networks for vision and image processing , 1992 .

[29]  Graeme Hirst,et al.  Semantic Interpretation and the Resolution of Ambiguity , 1987, Studies in natural language processing.

[30]  Paul F. M. J. Verschure,et al.  Beyond Rationalism: Symbols, Patterns and Behavior , 1992 .

[31]  Michael R. W. Dawson,et al.  Autonomous processing in parallel distributed processing networks , 1992 .

[32]  John Dinsmore,et al.  The symbolic and connectionist paradigms : closing the gap , 1992 .

[33]  Dekai Wu,et al.  Automatic inference: a probabilistic basis for natural language interpretation , 1992 .

[34]  Dekai Wu.  Approximate Maximum-Entropy Integration of Syntactic and Semantic Constraints , 1992 .

[35]  N. Chater,et al.  Proceedings of the fourteenth annual conference of the cognitive science society , 1992 .

[36]  M. Usher,et al.  Segmentation, Binding, and Illusory Conjunctions , 1991, Neural Computation.

[37]  M. Velmans.  Is human information processing conscious? , 1991, Behavioral and Brain Sciences.

[38]  L. Squire,et al.  The medial temporal lobe memory system , 1991, Science.

[39]  I. Tsuda.  Chaotic itinerancy as a dynamical basis of hermeneutics in brain and mind , 1991 .

[40]  Stephen Grossberg,et al.  ARTMAP: supervised real-time learning and classification of nonstationary data by a self-organizing neural network , 1991, [1991 Proceedings] IEEE Conference on Neural Networks for Ocean Engineering.

[41]  D. Whitteridge,et al.  An intracellular analysis of the visual responses of neurones in cat visual cortex. , 1991, The Journal of physiology.

[42]  E. Rolls.  Neural organization of higher visual functions , 1991, Current Opinion in Neurobiology.

[43]  James Geller,et al.  Parallel implementation of a class reasoner , 1991, J. Exp. Theor. Artif. Intell..

[44]  Stephen Grossberg,et al.  Synchronized oscillations during cooperative feature linking in a cortical model of visual perception , 1991, Neural Networks.

[45]  Y. Kuramoto.  Collective synchronization of pulse-coupled oscillators and excitable units , 1991 .

[46]  Dean Allemang,et al.  The Computational Complexity of Abduction , 1991, Artif. Intell..

[47]  Louisa Sadler,et al.  Structural Non-Correspondence in Translation , 1991, EACL.

[48]  S. Grossberg,et al.  Working Memory Networks for Learning Temporal Order, with Application to 3-D Visual Object Recognition , 1991 .

[49]  N. Chater,et al.  Against Logicist Cognitive Science , 1991 .

[50]  S. Grossberg,et al.  Pattern Recognition by Self-Organizing Neural Networks , 1991 .

[51]  W. Freeman.  The physiology of perception. , 1991, Scientific American.

[52]  Qing Yang,et al.  Pattern recognition by a distributed neural network: An industrial application , 1991, Neural Networks.

[53]  Bart Selman,et al.  Hard Problems for Simple Default Logics , 1989, Artif. Intell..

[54]  T. Horgan,et al.  Connectionism and the Philosophy of Mind , 1991 .

[55]  Robert Dale,et al.  Proceedings of the Thirteenth Annual Conference of the Cognitive Science Society , 1991 .

[56]  Jean-Pierre Corriveau,et al.  Time-constrained memory for reader-based text comprehension , 1991 .

[57]  John A. Barnden,et al.  Encoding techniques for complex information structures in connectionist systems , 1991 .

[58]  J. Changeux,et al.  The Wisconsin Card Sorting Test: theoretical analysis and modeling in a neuronal network. , 1991, Cerebral cortex.

[59]  Moshe Abeles,et al.  Corticonics: Neural Circuits of Cerebral Cortex , 1991 .

[60]  A. Newell.  Unified Theories of Cognition , 1990 .

[61]  M. Tanenhaus,et al.  Levels of representation in the interpretation of anaphoric reference and instrument inference , 1990, Memory & cognition.

[62]  David S. Touretzky,et al.  BoltzCONS: Dynamic Symbol Structures in a Connectionist Network , 1990, Artif. Intell..

[63]  Paul Smolensky,et al.  Tensor Product Variable Binding and the Representation of Symbolic Structures in Connectionist Systems , 1990, Artif. Intell..

[64]  Jordan B. Pollack,et al.  Recursive Distributed Representations , 1990, Artif. Intell..

[65]  Georg Dorffner,et al.  Konnektionismus in Artificial Intelligence und Kognitionsforschung. Proceedings 6. Österreichische Artificial Intelligence-Tagung (KONNAI), Salzburg, Österreich, 18. bis 21. September 1990 , 1990, Austrian Conference on Artificial Intelligence.

[66]  Reinhard Eckhorn,et al.  Feature Linking via Synchronization among Distributed Assemblies: Simulations of Results from Cat Visual Cortex , 1990, Neural Computation.

[67]  Ramanathan V. Guha,et al.  CYC: A Midterm Report , 1990, AI Mag..

[68]  B. Kadomtsev.  Complex systems-operational approaches , 1990 .

[69]  P. Davis.  Application of Optical Chaos to Temporal Pattern Search in a Nonlinear Optical Resonator , 1990 .

[70]  W. Singer,et al.  Stimulus‐Dependent Neuronal Oscillations in Cat Visual Cortex: Inter‐Columnar Interaction as Determined by Cross‐Correlation Analysis , 1990, The European journal of neuroscience.

[71]  Tim van Gelder,et al.  Compositionality: A Connectionist Variation on a Classical Theme , 1990, Cogn. Sci..

[72]  K. Kaneko.  Clustering, coding, switching, hierarchical ordering, and control in a network of chaotic elements , 1990 .

[73]  S. Grossberg,et al.  The Adaptive Brain , 1990 .

[74]  G. Lakoff.  Women, fire, and dangerous things : what categories reveal about the mind , 1988, Dialogue.

[75]  Drew McDermott,et al.  A critique of pure reason 1 , 1987, The Philosophy of Artificial Intelligence.

[76]  H. Haken,et al.  Synergetics of Cognition , 1990 .

[77]  E. Azmitia.  Microcultures of Dissociated Primary Central Nervous System Neurons , 1990 .

[78]  LOKENDRA SHASTRI,et al.  CONNECTIONISM AND THE COMPUTATIONAL EFFECTIVENESS OF REASONING , 1990 .

[79]  Reinhard Eckhorn,et al.  A Model for Feature Linking via Correlated Neural Activity , 1990 .

[80]  C. Koch,et al.  Some reflections on visual awareness. , 1990, Cold Spring Harbor symposia on quantitative biology.

[81]  C. Koch,et al.  Towards a neurobiological theory of consciousness , 1990 .

[82]  David J. Chalmers,et al.  Syntactic Transformations on Distributed Representations , 1990 .

[83]  Jonathan S. Evans,et al.  Bias in human reasoning , 1990 .

[84]  Charles F. Stevens,et al.  How Cortical Interconnectedness Varies with Network Size , 1989, Neural Computation.

[85]  A. Damasio.  Time-locked multiregional retroactivation: A systems-level proposal for the neural substrates of recall and recognition , 1989, Cognition.

[86]  Peter Norvig,et al.  Marker Passing as a Weak Method for Text Inferencing , 1989, Cogn. Sci..

[87]  G. W. Strong,et al.  A solution to the tag-assignment problem for neural networks , 1989, Behavioral and Brain Sciences.

[88]  W. J. Nowack.  Neurobiology of Neocortex , 1989, Neurology.

[89]  H Eichenbaum,et al.  The organization of spatial coding in the hippocampus: a study of neural ensemble activity , 1989, The Journal of neuroscience : the official journal of the Society for Neuroscience.

[90]  A. Ortony,et al.  Similarity and Analogical Reasoning , 1991 .

[91]  Christopher K. Riesbeck,et al.  Inside Case-Based Reasoning , 1989 .

[92]  K. Ikeda,et al.  Maxwell-Bloch Turbulence , 1989 .

[93]  W. Freeman.  Second Commentary: On the proper treatment of connectionism by Paul Smolensky (1988) - Neuromachismo Rekindled , 1989 .

[94]  W. Singer,et al.  Oscillatory responses in cat visual cortex exhibit inter-columnar synchronization which reflects global stimulus properties , 1989, Nature.

[95]  W. Singer,et al.  Stimulus-specific neuronal oscillations in orientation columns of cat visual cortex. , 1989, Proceedings of the National Academy of Sciences of the United States of America.

[96]  M. Humphreys,et al.  Different Ways to Cue a Coherent Memory System: A Theory for Episodic, Semantic, and Procedural Tasks. , 1989 .

[97]  S. Hayes.  Rule-governed behavior : cognition, contingencies, and instructional control , 1989 .

[98]  R. Pfeifer,et al.  Connectionism in Perspective , 1989 .

[99]  K. Kaneko.  Pattern dynamics in spatiotemporal chaos: Pattern selection, diffusion of defect and pattern competition intermettency , 1989 .

[100]  Michael G. Dyer,et al.  High-level Inferencing in a Connectionist Network , 1989 .

[101]  Charles P. Dolan,et al.  Tensor Product Production System: a Modular Architecture and Representation , 1989 .

[102]  Rodney Cotterill,et al.  Models of brain function , 1989 .

[103]  Geoffrey E. Hinton,et al.  Parallel Models of Associative Memory , 1989 .

[104]  Ryszard S. Michalski,et al.  The Logic of Plausible Reasoning: A Core Theory , 1989, Cogn. Sci..

[105]  Y. Frégnac.  The Neural and Molecular Bases of Learning (Life Sciences Report 38 — Dahlem Konferenzen) edited by J. P. Changeux and M. Konishi, John Wiley & Sons, 1987. £55.00 (xiii + 559 pages) ISBN 0 471 91569 6 , 1988, Trends in Neurosciences.

[106]  Hector J. Levesque,et al.  Logic and the complexity of reasoning , 1988, J. Philos. Log..

[107]  S. Pinker,et al.  Connections and symbols , 1988 .

[108]  G. R. Potts,et al.  Assessing the occurrence of elaborative inferences: Lexical decision versus naming , 1988 .

[109]  Lokendra Shastri,et al.  A Connectionist Approach to Knowledge Representation and Limited Inference , 1988, Cogn. Sci..

[110]  Geoffrey E. Hinton,et al.  A Distributed Connectionist Production System , 1988, Cogn. Sci..

[111]  Keith Stenning,et al.  On the construction of representations for individuals from descriptions in text , 1988 .

[112]  S. Grossberg.  Neural Networks and Natural Intelligence , 1988 .

[113]  W. Kintsch.  The role of knowledge in discourse comprehension: a construction-integration model. , 1988, Psychological review.

[114]  J. Fodor,et al.  Connectionism and cognitive architecture: A critical analysis , 1988, Cognition.

[115]  P. Smolensky.  On the proper treatment of connectionism , 1988, Behavioral and Brain Sciences.

[116]  John McCarthy,et al.  Epistemological challenges for connectionism , 1988, Behavioral and Brain Sciences.

[117]  N. Sharkey,et al.  Advances in cognitive science , 1988 .

[118]  P. Culicover,et al.  Neural connections, mental computation , 1988 .

[119]  P. Johnson-Laird.  The computer and the mind: an introduction to cognitive science , 1988 .

[120]  Roger C. Schank,et al.  SCRIPTS, PLANS, GOALS, AND UNDERSTANDING , 1988 .

[121]  D. O. Hebb,et al.  The organization of behavior , 1988 .

[122]  Gray Clossman,et al.  A model of categorization and learning in a connectionist broadcast system , 1988 .

[123]  Garrison W. Cottrell,et al.  A connectionist approach to word sense disambiguation , 1988 .

[124]  Yoko Yamaguchi,et al.  Synergetic computer and holonics - information dynamics of a semantic computer , 1987 .

[125]  James Alexander Hendler,et al.  integrating Marker Passing and Problem Solving: A Spreading Activation Approach To Improved Choice in Planning , 1987 .

[126]  W. Freeman,et al.  Spatial patterns of visual cortical fast EEG during conditioned reflex in a rhesus monkey , 1987, Brain Research.

[127]  Kurt Mehlhorn,et al.  Parallel Algorithms and Architectures , 1987 .

[128]  Michael R. Genesereth,et al.  Logical foundations of artificial intelligence , 1987 .

[129]  I. V. Ramakrishnan,et al.  Term Matching on Parallel Computers , 1987, ICALP.

[130]  I. Tsuda,et al.  Extended information in one-dimensional maps , 1987 .

[131]  W. Freeman,et al.  How brains make chaos in order to make sense of the world , 1987, Behavioral and Brain Sciences.

[132]  J. Klayman,et al.  Confirmation, Disconfirmation, and Informa-tion in Hypothesis Testing , 1987 .

[133]  Stephen Grossberg,et al.  Competitive Learning: From Interactive Activation to Adaptive Resonance , 1987, Cogn. Sci..

[134]  L. Squire.  Memory and Brain , 1987 .

[135]  Garrison W. Cottrell,et al.  Lexical ambiguity resolution , 1987 .

[136]  James F. Allen.  Natural language understanding , 1987, Bejnamin/Cummings series in computer science.

[137]  B. Strehler,et al.  Evidence on precise time-coded symbols and memory of patterns in monkey cortical neuronal spike trains. , 1986, Proceedings of the National Academy of Sciences of the United States of America.

[138]  Jeffrey D. Ullman,et al.  Parallel complexity of logical query programs , 1986, 27th Annual Symposium on Foundations of Computer Science (sfcs 1986).

[139]  James L. McClelland,et al.  Parallel Distributed Processing: Explorations in the Microstructure of Cognition : Psychological and Biological Models , 1986 .

[140]  James L. McClelland,et al.  Parallel distributed processing: explorations in the microstructure of cognition, vol. 1: foundations , 1986 .

[141]  M. Minsky.  The Society of Mind , 1986 .

[142]  G. Lynch,et al.  Synapses, circuits, and the beginnings of memory , 1986 .

[143]  Wolfgang Bibel,et al.  Fundamentals of artificial intelligence , 1986 .

[144]  G Palm,et al.  Brain Theory , 1986, Springer Berlin Heidelberg.

[145]  R. Ratcliff,et al.  Inferences about predictable events. , 1986, Journal of experimental psychology. Learning, memory, and cognition.

[146]  John Haugeland.  Mind design , 1985 .

[147]  Garrison W. Cottrell,et al.  Parallelism in Inheritance Hierarchies with Exceptions , 1985, IJCAI.

[148]  H. Levesque,et al.  Readings in Knowledge Representation , 1985 .

[149]  J. Feldman.  Four frames suffice: A provisional model of vision and space , 1985, Behavioral and Brain Sciences.

[150]  S. Grossberg,et al.  Neural dynamics of form perception: boundary completion, illusory figures, and neon color spreading. , 1985, Psychological review.

[151]  S Grossberg,et al.  Neural dynamics of perceptual grouping: Textures, boundaries, and emergent segmentations , 1985, Perception & psychophysics.

[152]  Bruce G. Buchanan,et al.  The MYCIN Experiments of the Stanford Heuristic Programming Project , 1985 .

[153]  John C. Mitchell,et al.  On the Sequential Nature of Unification , 1984, J. Log. Program..

[154]  F. Crick.  Function of the thalamic reticular complex: the searchlight hypothesis. , 1984, Proceedings of the National Academy of Sciences of the United States of America.

[155]  J. Keenan,et al.  The effects of causal cohesion on comprehension and memory , 1984 .

[156]  David S. Touretzky,et al.  The Mathematics of Inheritance Systems , 1984 .

[157]  P. Johnson-Laird.  Mental models , 1989 .

[158]  J. S. Evans,et al.  Linguistic Determinants of Bias in Conditional Reasoning , 1983 .

[159]  A. Tversky,et al.  Extensional versus intuitive reasoning: the conjunction fallacy in probability judgment , 1983 .

[160]  M. Dyer.  In-Depth Understanding: A Computer Model of Integrated Processing for Narrative Comprehension , 1983 .

[161]  M. Singer,et al.  Inferring consequences in story comprehension , 1983 .

[162]  R. Gibbs.  Do people always process the literal meanings of indirect requests , 1983 .

[163]  Eugene Charniak,et al.  Passing Markers: A Theory of Contextual Influence in Language Comprehension* , 1983 .

[164]  L. Reder,et al.  Integrated knowledge in different tasks: The role of retrieval strategy on fan effects , 1983 .

[165]  John R. Anderson.  The Architecture of Cognition , 1983 .

[166]  E. Tulving.  Elements of episodic memory , 1983 .

[167]  L. Rips.  Cognitive Processes in Propositional Reasoning. , 1983 .

[168]  R. Wilensky.  Planning and Understanding: A Computational Approach to Human Reasoning , 1983 .

[169]  J. Fodor.  The Modularity of mind. An essay on faculty psychology , 1986 .

[170]  Albert T. Corbett,et al.  Instrument inferences and verb schemata , 1982 .

[171]  Gèunther Palm,et al.  Neural Assemblies: An Alternative Approach to Artificial Intelligence , 1982 .

[172]  Jerome A. Feldman,et al.  Connectionist Models and Their Properties , 1982, Cogn. Sci..

[173]  T. Shallice.  Specific impairments of planning. , 1982, Philosophical transactions of the Royal Society of London. Series B, Biological sciences.

[174]  Wendy G. Lehnert,et al.  Strategies for Natural Language Processing , 1982 .

[175]  Professor Moshe Abeles,et al.  Local Cortical Circuits , 1982, Studies of Brain Function.

[176]  W. Freeman.  A Physiological Hypothesis of Perception , 2015, Perspectives in biology and medicine.

[177]  R. Ratcliff,et al.  The comprehension processes and memory structures involved in instrumental inference , 1981 .

[178]  K. Tanaka,et al.  Cross-Correlation Analysis of Interneuronal Connectivity in cat visual cortex. , 1981, Journal of neurophysiology.

[179]  Raymond Reiter,et al.  A Logic for Default Reasoning , 1987, Artif. Intell..

[180]  C. Raymond Perrault,et al.  Analyzing Intention in Utterances , 1986, Artif. Intell..

[181]  G. Lakoff,et al.  Metaphors We Live by , 1982 .

[182]  Roger Ratcliff,et al.  The comprehension processes and memory structures involved in anaphoric reference , 1980 .

[183]  F. Dudek,et al.  Dye-coupling between CA3 pyramidal cells in slices of rat hippocampus , 1980, Brain Research.

[184]  A. Treisman,et al.  A feature-integration theory of attention , 1980, Cognitive Psychology.

[185]  Wayne A. Wickelgren,et al.  Chunking and consolidation: A theoretical synthesis of semantic networks configuring in conditioning , 1979 .

[186]  Judith N. Levi,et al.  The syntax and semantics of complex nominals , 1978 .

[187]  H. F. J. M. Buffart,et al.  Formal theories of visual perception , 1978 .

[188]  M. Braine.  On the Relation Between the Natural Logic of Reasoning and Standard Logic. , 1978 .

[189]  S. Kosslyn,et al.  Category and Continuum in Mental Comparisons. , 1977 .

[190]  Pamela A. Downing.  On the Creation and Use of English Compound Nouns. , 1977 .

[191]  Walter Schneider,et al.  Controlled and automatic human information processing: II. Perceptual learning, automatic attending and a general theory. , 1977 .

[192]  Walter Schneider,et al.  Controlled and Automatic Human Information Processing: 1. Detection, Search, and Attention. , 1977 .

[193]  M. Just,et al.  Cognitive processes in comprehension , 1977 .

[194]  Patrick Henry Winston,et al.  The psychology of computer vision , 1976, Pattern Recognit..

[195]  Alan S. Brown,et al.  Information Processing and Cognition: The Loyola Symposium , 1976 .

[196]  G. Schwartz,et al.  Consciousness and Self-Regulation , 1976 .

[197]  Donald O. Walter,et al.  Mass action in the nervous system , 1975 .

[198]  W. Kintsch,et al.  The representation of meaning in memory , 1974 .

[199]  Allen Newell,et al.  Human Problem Solving. , 1973 .

[200]  J. S. Evans,et al.  Interpretation and Matching Bias in a Reasoning Task , 1972 .

[201]  D Marr,et al.  Simple memory: a theory for archicortex. , 1971, Philosophical transactions of the Royal Society of London. Series B, Biological sciences.

[202]  G. C. Quarton,et al.  The Neurosciences;: Second study program , 1970 .

[203]  Marvin Minsky,et al.  Semantic Information Processing , 1968 .

[204]  B. Foss.  New Horizons in Psychology 1 , 1966 .

[205]  B. Milner.  Effects of Different Brain Lesions on Card Sorting: The Role of the Frontal Lobes , 1963 .

[206]  D. Hubel,et al.  Receptive fields, binocular interaction and functional architecture in the cat's visual cortex , 1962, The Journal of physiology.

[207]  P. Wason.  On the Failure to Eliminate Hypotheses in a Conceptual Task , 1960 .

[208]  W. Pitts,et al.  What the Frog's Eye Tells the Frog's Brain , 1959, Proceedings of the IRE.

[209]  D. Broadbent.  Perception and communication , 1958 .

[210]  V. Mountcastle.  Modality and topographic properties of single neurons of cat's somatic sensory cortex. , 1957, Journal of neurophysiology.

[211]  G. A. Miller.  THE PSYCHOLOGICAL REVIEW THE MAGICAL NUMBER SEVEN, PLUS OR MINUS TWO: SOME LIMITS ON OUR CAPACITY FOR PROCESSING INFORMATION 1 , 1956 .