Interest in thought experiments (TEs) derives from the paradox: “How can findings that carry conviction result from a new experiment conducted entirely within the head?” Historical studies have established the importance of TEs in science but have proposed disparate hypotheses concerning the source of knowledge in TEs, ranging from empiricist to rationalist accounts. This article analyzes TEs in think‐aloud protocols of scientifically trained experts to examine more fine‐grained information about their use. Some TEs appear powerful enough to discredit an existing (...) theory—a disconfirmatory purpose. In addition, confirmatory and generative purposes were identified for other TEs. One can also use details in transcript data, including imagery reports and gestures, to provide evidence for a central role played by imagistic simulations in many TEs, and to suggest that these simulations can generate new knowledge using several sources, including the “extended application” of perceptual motor schemas, implicit prior knowledge, and spatial reasoning operations, in contrast to formal arguments. These sources suggest what it means for TEs to be grounded in embodied processes that can begin to explain the paradox above. This leads to a rationalistic view of TEs as using productive internal reasoning, but the view also acknowledges the historical role that experience with the world can play in forming certain schemas used in TEs. Understanding such processes could help provide a foundation for developing a larger model of scientific investigation processes grounded on imagistic simulation (Clement, 2008). (shrink)

BioPortal is a Web portal that provides access to a library of biomedical ontologies and terminologies developed in OWL, RDF(S), OBO format, Protégé frames, and Rich Release Format. BioPortal functionality, driven by a service-oriented architecture, includes the ability to browse, search and visualize ontologies (Figure 1). The Web interface also facilitates community-based participation in the evaluation and evolution of ontology content.

Reasoning patterns found in Galileo’s treatise on machines, On Mechanics, are compared with patterns identified in case studies of scientifically trained experts thinking aloud, and many similarities are found. At one level the primary patterns identified are ordered analogy sequences and special diagrammatic techniques to support them. At a deeper level I develop constructs to describe patterns that can support embodied, imagistic, mental simulations as a central underlying process. Additionally, a larger hypothesized pattern of ‘progressive imagistic generalization’—Galileo’s development of a (...) model or mechanism that becomes more and more general with each machine while still being imagistically projectable into many machines—provides a way to think about his progress toward a modern explanatory model of torque. By unpacking his arguments, we gain an appreciation of his skillful ability to foster imagistic processes underlying scientific thinking. (shrink)

Seleucus, son of Antiochus I Soter, is mentionned as his father's coregent from 281, but disappeared in 266 under mysterious circumstances, on which ancient authors and modern historiography oppose each other. Ancient historians talk about a family crisis that led to Seleucus' execution, while Moderns conclude to natural death. By reappraising sources, we intend to demonstrate that this event results from the failure of a political experiment : a triarchy which associated Antiochus Soter to both of his sons, Seleucus and (...) Antiochus. Séleucos, fils d'Antiochos Ier Sôter, apparaît comme corégent de son père dès 281, mais disparaît en 266 dans des circonstances mystérieuses, sur lesquelles les auteurs anciens et l'historiographie moderne s'opposent. Les sources évoquent une crise familiale ayant conduit à l'exécution du fils par le père, mais les Modernes préfèrent conclure qu'il a été emporté par une épidémie. En réétudiant les sources, nous entendons montrer que la disparition du corégent Séleucos résulte de l'échec d'une expérience politique originale: une triarchie associant Antiochos Ier et ses deux fils, Séleucos et Antiochos. (shrink)

Un rite de deuil particulier et rarement attesté dans les sources classiques consiste à raser la crinière des chevaux et parfois des mulets à la mort d’un haut personnage. Cette pratique apparaît notamment parmi les mesures du deuil décrété par Alexandre à la mort d’Héphaistion en 324, ce qui a été versé par les Anciens — et souvent par les Modernes à leur suite — à la liste des comportements excessifs et barbares du conquérant macédonien à la fin de son (...) règne. Une enquête sur les origines de ce rite montre que ce dernier constitue un bel exemple des transferts culturels du ve siècle entre les Perses et les Grecs, avec une réception favorable en Thessalie et une perception plus mitigée en Grèce du sud. Cette pratique offre un éclairage sur ce que les Grecs appelaient un mega penthos (grand deuil / deuil public) et sur l’utilisation politique qu’Alexandre a essayé d’en faire en 324. (shrink)