Andreas Hüttemann

Many biologists and philosophers have worried that importing models of reasoning from the physical sciences obscures our understanding of reasoning in the life sciences. In this paper we discuss one example that partially validates this concern: part-whole reductive explanations. Biology and physics tend to incorporate different models of temporality in part-whole reductive explanations. This results from differential emphases on compositional and causal facets of reductive explanations, which have not been distinguished reliably in prior philosophical analyses. Keeping these two facets distinct facilitates the identifi cation of two further aspects of reductive explanation: intrinsicality and fundamentality. Our account provides resources for discriminating between different types of reductive explanation and suggests a new approach to comprehending similarities and differences in the explanatory reasoning found in biology and physics.

In diesem Aufsatz untersuche sich, ob sich der Hobbes’sche Naturzustand als Gefangenendilemma beschreiben lässt und welche Konsequenzen dies gegebenenfalls hat. Ich argumentiere für die Thesen, dass erstens eine solche Beschreibung eine angemessene Charakterisierung des Hobbes’schen Naturzustandes ist , dass das Gefangenendilemma zweitens kein Problem für die Hobbes’sche Argumentation aufwirft und dass drittens Hobbes sein Argumentationsziel verfehlte, wenn er den Naturzustand anders beschriebe, d.h. so, als seien die Applikationsbedingungen des Gefangenendilemmas nicht erfüllt. Das Gefangenendilemma, in dem sich die Naturzustandsbewohner befinden, ist daher notwendige Voraussetzung für die Vernünftigkeit eines Staates, in dem der Souverän mit einer Hobbes’schen Machtfülle ausgestattet ist

Earman and Roberts claim that there is neither a persuasive account of the truth-conditions of ceteris paribus laws, nor of how such laws can be confirmed or disconfirmed. I will give an account of the truth conditions of ceteris paribus laws in physics in terms of dispositions. It will meet the objections standardly raised against such an account. Furthermore I will elucidate how ceteris paribus laws can be tested in physics. The essential point is that physics provides methodologies for dealing with disturbing factors. For this reason disturbing factors need not be listed explicitly in law-statements. In virtue of the methodologies it is possible to test how systems would behave if the disturbing factors were absent. I will argue that this suffices to establish the tenability of the dispositional account of ceteris paribus laws

It is my aim in this paper to look at some of the arguments that are brought forward for or against certain claims to unity/disunity (in particular to examine those arguments from science and from scientific practice) in order to evaluate whether they really show what they claim to. This presupposes that the concept or rather the concepts of the unity of physics are reasonably clear. Three concepts of unity can be identified: (1) ontological unity, which refers to the objects physics is about; (2) descriptive unity, which addresses the descriptive devices physics employs in dealing with physical systems (3) unity of practice, which deals with what physicists actually do.

Laws are supposed to tell us how physical systems actually behave. The analysis of an important part of physical practice--abstraction--shows, however, that laws describe the behavior of physical systems under very special circumstances, namely when they are isolated. Nevertheless, laws are applied in cases of non-isolation as well. This practice requires an explanation. It is argued that one has to assume that physical systems have dispositions. I take these to be innocuous from an empiricist's standpoint because they can--at least in principle--be measured. Laws can be applied whenever such a disposition is present, they describe how the physical system would behave if the disposition were manifest.

Die Untersuchung besteht aus drei Teilen. Im ersten Teil argumentiere ich, daß in der frühen Neuzeit durch die Zurückweisung des scholastischen Vokabulars das Problem, Ordnung und Regelmäßigkeit in der Natur zu erklären, neu aufgeworfen wird. Descartes führt den Begriff des Naturgesetzes ein, um dieses Problem zu lösen. Im zweiten und dritten Teil analysiere ich, was Descartes unter einem Naturgesetz versteht. Im zweiten Teil zeige ich, daß es für die verbreitete Auffassung, Descartes halte Naturgesetze für ewige Wahrheiten, keine guten Gründe gibt. Im dritten Teil untersuche ich die Rolle, die Gott – Descartes zufolge – als Urheber der Naturgesetze spielt. Ich argumentiere, daß die “Daumenkino”-Auffassung von Naturgesetzen keine Folge der “creatio continua”- These ist, sondern eine Konsequenz des Cartesischen Materiebegriffs. Schließlich bemühe ich mich verständlich zu machen, weshalb Descartes fürchtet, seine Naturgesetzauffassung lege die Hypothese nahe, Gott sei die Weltseele

In this paper I will introduce a problem for at least those Humeans who believe that the future is open. More particularly, I will argue that the following aspect of scientific practice cannot be explained by openfuture- Humeanism: There is a distinction between states that we cannot bring about (which are represented in scientific models as nomologically impossible) and states that we merely happen not to bring about. Open-future-Humeanism has no convincing account of this distinction. Therefore it fails to explain why we cannot bring about certain states of affairs, it cannot explain what I call the “recalcitrance of nature”.

In this paper I take a look at what I take to be the best argument for dispositions. According to this argument we need dispositions in order to understand certain features of scientific practice. I point out that these dispositions have to be continuously manifestable. Furthermore I will argue that dispositions are not the causes of their manifestations. However, dispositions and causation are closely connected. What it is to be a cause can best be understood in terms of counterfactuals that are based on dispositions.