Explicitness has usually been approached from two points of view, labelled by Kirsh the structural and the process view, that hold opposite assumptions to determine when information is explicit. In this paper, we offer an intermediate view that retains intuitions from both of them. We establish three conditions for explicit information that preserve a structural requirement, and a notion of explicitness as a continuous dimension. A problem with the former accounts was their disconnection with psychological work on the issue. We (...) review studies by Karmiloff-Smith, and Shanks and St. John to show that the proposed conditions have psychological grounds. Finally, we examine the problem of explicit rules in connectionist systems in the light of our framework. (shrink)

This book presents the Proceedings of the Second International Colloquium on Cognitive Science, held at San Sebastian in May, 1991, to discuss from an interdisciplinary point of view topics which are at the intersection of philosophy and cognitive science. With a total of eleven papers from leading scholars in the field, the volume provides many different theoretical approaches to the study of Categories, Consciousness and Reasoning. The book is addressed to researchers, specialists, advanced students and scholars in the fields of (...) epistemology, philosophy of mind, psychology, semantics, logic and artificial intelligence. (shrink)

O'Brien et al. reported that readers generated elaborative inferences only when a text contained characteristics that made it easy to predict the specific inference that a reader would draw, and virtually eliminated the possibility of the inference being discon-firmed. Garrod et al., however, offered two qualifications to these conclusions. First, the two text characteristics manipulated may have produced different types of elaborative inferencing: a biasing context results in a passive form of elaborative inferencing, involving setting up a context of interpretation, (...) whereas the presence of a demand sentence invites the reader to actively predict a subsequent expression. Secondly, clear evidence for either type of inference will be apparent only with truly anaphoric materials. This work describes how a passive form of elaborative inferencing, reported by Garrod et al, may be implemented in a connectionist manner. We take the connectionist model proposed by Shastri and Ajjanagadde in order to represent a text in the form of a network. Next we analyze and discuss how an attentional focus could operate with the proposed reasoner system in order to deal with inference control and anaphora resolution, during text understanding. Our own suggestion is that the system proposed by Shastri and Ajjanagadde could be extended by incorporating focus in order to apply it to some open problems related to text processing. However, this extension presents implementational problems due to its local character. Distributed models seem to be in a better position to deal with the shift of the attentional states, given that these systems can learn. Particularly, the model proposed by Sun is close to our aims, and so we will discuss its implications in order to design a cognitive architecture for text comprehension. (shrink)

Taking into account the difficulties that all attempts at a solution of the problem of causal-explanatory exclusion have experienced, we analyze in this paper the chances that mind-body causation is a case of overdetermination, a line of attack that has scarcely been explored. Our conclusion is that claiming that behaviors are causally overdetermined cannot solve the problem of causal-explanatory exclusion. The reason is the problem of massive coincidence, that can only be avoided by establishing a relation between mind and body; (...) that is, by denying overdetermination. The only way to defend that mind-body causation is a case of overdetermination would be by denying any modal force whatever to the principle of the causal closure of the physical, and this is a claim we would not like to reject. (shrink)