Current debate in cognitive science, from robotics to analysis of vision, deals with problems like the perception of form, the structure and formation of mental images and their modelling, the ecological development of artificial intelligence, and cognitive analysis of natural language. It focuses in particular on the presence of a hierarchy of intellectual constructions in different formats of representation. These diverse approaches, which share a common assumption of the inner nature of representation, call for a new epistemology - even a new psychophysics - based on a theory of reference which is intrinsically cognitive. As a contribution to contemporary research, the reading presents the core of theories developed in Central Europe between the late nineteenth and early twentieth centuries by philosophers, physicists, psychologists and semanticists who shared a dynamic approach and a pronounced concern with problems of interaction and dependence. These theories offer innovative solutions to some of the epistemological and philosophical problems currently at the centre of debate, like part-whole, theory of relations, and conceptual and linguistic categorization.

The central idea developed by the contributions to this book is that the split between analytic philosophy and phenomenology - perhaps the most impor tant schism in twentieth-century philosophy - resulted from a radicalization of reciprocal partialities. Both schools of thought share, in fact, the same cultural background and their same initial stimulus in the thought of Franz Brentano. And one outcome of the subsequent rift between them was the oblivion into which the figure and thought of Brentano have fallen. The first step to take in remedying this split is to return to Brentano and to reconstruct the 'map' of Brent ani sm. The second task (which has been addressed by this book) is to revive inter est in the theoretical complexity of Brentano' s thought and of his pupils and to revitalize those aspects that have been neglected by subsequent debate within the various movements of Brentanian inspiration. We have accordingly decided to organize the book into two introductory es says followed by two sections (Parts 1 and 2) which systematically examine Brentano's thought and that of his followers. The two introductory essays re construct the reasons for the 'invisibility', so to speak, of Brentano and set out of his philosophical doctrine. Part 1 of the book then ex the essential features amines six of Brentano's most outstanding pupils (Marty, Stumpf, Meinong, Ehrenfels, Husserl and Twardowski). Part 2 contains nine essays concentrating on the principal topics addressed by the Brentanians."

Current debate in cognitive science, from robotics to analysis of vision, deals with problems like the perception of form, the structure and formation of mental images and their modelling, the ecological development of artificial intelligence, and cognitive analysis of natural language. It focuses in particular on the presence of a hierarchy of intellectual constructions in different formats of representation. These diverse approaches, which share a common assumption of the inner nature of representation, call for a new epistemology - even a new psychophysics - based on a theory of reference which is intrinsically cognitive. As a contribution to contemporary research, the reading presents the core of theories developed in Central Europe between the late nineteenth and early twentieth centuries by philosophers, physicists, psychologists and semanticists who shared a dynamic approach and a pronounced concern with problems of interaction and dependence. These theories offer innovative solutions to some of the epistemological and philosophical problems currently at the centre of debate, like part-whole, theory of relations, and conceptual and linguistic categorization.

impossible triangle, after apprehension of the perceptively given mode of being of that 'object', the visual system assumes that all three sides touch on all three sides, whereas this happens on only one side. In fact, the sides touch only optically, because they are separate in depth. In Meinong's words, Penrose's triangle has been inserted in an 'objective', or in what we would today call a "cognitive schema." Re-examination of the Graz school's theory, as said, sheds light on several problems concerning the theory of perception, and, as Luccio points out in his contribution to this book, it helps to eliminate a number of over-simplistic commonplaces, such as the identification of the cognitivist notion of 'top down' with Wertheimer's 'von oben unten', and of 'bottom up' with his 'von unten nach oben'. In fact, neither Hochberg's and Gregory's 'concept-driven' perception nor Gibson's 'data-driven' perception coincide with the original conception of the Gestalt.