In the so-called “Spin-Echo Experiments” the behaviour of a spin’s system seems to violate the second law of thermodynamics. For this reason the “Spin-Echo Experiments” are considered of particular interest for the Foundations of Physics. Interventionists have provided a classical explanation (Blatt 1959; Ridderbos & Redhead 1998) and a quantum-based explanation (Hemmo & Shenker 2005) of these experiments. Here both interventionist explanations are assessed by means of the Manipulability Theory of Causal Explanation (Woodward 2003). It is argued that interventionism would (...) gain explanatory depth by providing functional relations and predicting relaxation times. En los llamados “experimentos espín-eco” el comportamiento del sistema de espines parece violar la segunda ley de la termodinámica. Por esta razón, los “experimentos espín-eco” son considerados de gran interés en Fundamentos de la Física. Los intervencionistas han ofrecido explicaciones clásicas (Blatt 1959; Ridderbos & Redhead 1998) y explicaciones basadas en mecánica cuántica (Hemmo & Shenker 2005) de dichos experimentos. Aquí ambas explicaciones intervencionistas son analizadas mediante la Teoría Manipulabilista de las Explicaciones Causales (Woodward 2003). Se argumenta que el intervencionismo ganaría profundidad explicativa si proporcionara relaciones funcionales y realizara predicciones de los tiempos de relajación. (shrink)

The distance, as the crow flies, between the two poles can be covered in twenty hours. Thanks to cartography, telecommunications and the precise measurement of distance, we have exhaustive knowledge of the globe. Nevertheless, we are still so removed from each other that everything, or almost everything, remains to be discovered. Just as the past is not clear to us when it takes the historical route, the present brings us no understanding of human ways. The more we advance in knowledge (...) the more proof we have, as Pascal said, that we know nothing. (shrink)

This paper aims to provide an answer to James Woodward’s article “Flagpoles anyone? Causal and explanatory asymmetries”. It will be conjectured that, when causal directionality depends on the experimental design, it is because the variables involved are capable of producing changes in each other. This will be exemplified using the case of ideal gases as opposed to the flagpole-shadow scenario.