Boris Hennig

According to the aspect theory of instantiation, a particular A instantiates a universal B if and only if an aspect of A is cross-count identical with an aspect of B. This involves the assumption that both particulars and universals have aspects, and that aspects can mediate between different ways of counting things. I will ask what is new about this account of instantiation and, more importantly, whether it is an improvement on its older relatives. It will turn out that the part of it that is new is the notion of cross-count identity among aspects. As I will show, this notion is both dubious and unnecessary. I will end by presenting a simplified aspect theory of instantiation that does not involve cross-count identity

In this essay I defend the claim that the life of a living being is not one of its properties but something different: a mode of being. It follows from this that living beings should not be taken to be things that possess the property of being alive. Second, I argue that living beings are essentially involved in ongoing activities as long as they exist. Life cannot only be a disposition to be active, but must itself be an ongoing activity. Third, I suggest that for something to be a living being is to engage in activities whose success is determined by criteria that emerge exclusively from a proper account of the nature of the living being in question. To identify something as a living being is not to attribute a particular property to it, but to say what criteria apply to what it actually is or does.

Obwohl ‚conscientia’ ein zentraler Grundbegriff der cartesischen Metaphysik ist, sagt Descartes nirgends explizit, was er damit meint. Auch aus der Art und Weise, in der er das Wort verwendet, lässt sich dessen Bedeutung nicht vollends erschließen. Insbesondere handelt es sich nicht um einen reflexiven Denkakt (cogitatio), nicht um eine Disposition zum Haben solcher cogitationes und nicht um eine Art Aufmerksamkeit. Um die Bedeutung des Begriffes zu klären, schlage ich vor, auf klassische Texte von Augustinus, Thomas von Aquin und jesuitischen Autoren zurückzugreifen. Es ergibt sich, dass man unter der conscientia traditionell ein Wissen um den moralischen Wert einer Handlung verstand, das der Handelnde mit einem idealen Beobachter (d.i. Gott) teilt. Ich behaupte, dass sich diese Begriffsbestimmung mehr oder weniger analog auf Descartes übertragen lässt. Die cartesische conscientia ist demnach ein Wissen um den spezifischen Wert eines Gedanken, das der Denker mit einem idealen Beobachter teilt.

Descartes claims that God is a substance, and that mind and body are two different and separable substances. This paper provides some background that renders these claims intelligible. For Descartes, that something is real means it can exist in separation, and something is a substance if it does not depend on other substances for its existence. Further, separable objects are correlates of distinct ideas, for an idea is distinct (in an objective sense) if its object may be easily and clearly separated from everything that is not its object. It follows that if our idea of God is our most distinct idea, as Descartes claims, then God must be a substance in the Cartesian sense of the term. Also, if we can have an idea of a thinking subject which does not in any sense refer to bodily things, and if bodily things are substances, then mind and body must be two different substances

The sciences may be able to describe living beings, but this is not to account for their life. Life is not a describable property of things. There is also no philosophical a priori argument by which one could prove the existence of life – except perhaps our own. In order to understand what life is, we must start with our conception of that life that we know, human life, and reduce the notion of this life to a notion of mere life. We may do this by introducing the following distinctions. Intentional movements may succeed, be interrupted, or be mistaken. In contrast, merely teleological movements can only succeed or be interrupted, but not mistaken. Further, intentional movements are executed as more or less suitable means for achieving an end. Merely teleological movements are not performed as means to ends in this sense, but that does not render them less goal-directed.

I will in this paper attempt to extract a positive doctrine on the substantiality of the human soul from Ghazali"s critique of the Aristotelian philosophical tradition. Rather than reflecting on the possibilities and limitations of intercultural dialogue, my aim is to directly engage in such dialogue. Accordingly, I will not suppose that we need to develop and apply external standards according to which one of the two philosophical traditions addressed here, Western and Islamic, may turn out to be superior. Up to a certain point, Western and Islamic philosophy are virtually indistinguishable regarding their style, the main topics, and the arguments discussed, which both take over from Aristotle and the Neoplatonists. Further, at least up to Ghazali, no Islamic philosopher actually employs standards of rationality that would differ from the standards also accepted in the West. Ghazali himself would certainly be at least as disturbed by a valid philosophical objection to his claims as any other serious philosopher. He does not pursue another kind of project, but submits to the same standards of truth and validity, as far as philosophical argument reaches. His point is, of course, that these standards do not reach as far as some philosophers suppose. But this, again, is not a particularly "Islamic� insight

I will argue that Aristotle’s fourfold division of four causes naturally arises from a combination of two distinctions (a) between things and changes, and (b) between that which potentially is something and what it potentially is. Within this scheme, what is usually called the “efficient cause” is something that potentially is a certain natural change, and the “final cause” is, at least in a basic sense, what the efficient cause potentially is. I will further argue that the essences of things and changes are not features or attributes of them, but paradigms that set the standards according to which these things and changes may be judged to be natural or typical. The “formal cause” of a natural thing will be shown to be its essence in this sense: it sets the standards of typicality that apply to instances of its kind. The final cause will be shown to set the standard of typicality for natural changes. When we understand Aristotle’s doctrine of the four causes in this way, it becomes clear on what basis he could convincingly argue that final causality is operative in the whole of nature.

The paper demonstrates that the biological species concept that Mayr con- trasts with the typological one in fact presupposes a version of the typological species concept. For one cannot assess whether two living beings are capable of producing offspring without already knowing what would count as off- spring. Therefore, one must know non-relational features of typical offspring of a kind of living beings in order to be able to apply the biological species concept. The typological species concept that is at stake here is the Aristote- lian one.

Although Descartes is often said to have coined the modern notion of 'consciousness', he nowhere defines the according Latin term (conscientia), neither explicitly nor implicitly. This may either imply that he used the word in a sense that he did not make sufficiently clear, that he was not the first to use 'conscientia' in its modern psychological sense, or that he still used it in its traditional sense. I argue for the third assumption: Descartes used 'conscientia' according to the traditional meaning that we also find in the writings of St. Paul, Augustine, Aquinas and later scholastics. Thus for Descartes, conscientia is not a kind of speculative self-knowledge, inner observation or reflexive awareness. Rather, it is a kind of practical knowledge. This is a bold claim. I will argue for it (1) by closely examining the key passages in the Cartesian writings and (2) by re-evaluating the traditional use of the Latin 'conscientia'. Then I will (3) draw some consequences. 1. Descartes makes rather clear what consciousness (conscientia) is not. To take only the most likely candidates. Consciousness is not a thought (cogitatio), since every thought must be accompanied by consciousness. Further, it is not a disposition. Descartes claims that the object of our consciousness never is a possible, but always must be an actual thought. It would be difficult to see how a disposition could be about an actual thought rather than a possible one. But consciousness is also not an attribute of a thought, since Descartes always ascribes it to the thinker herself. 2. In classical and mediaeval Latin, 'conscientia' did not mean 'consciousness', but also not exactly the same as 'moral conscience'. Three aspects are involved in the traditional meaning of the term. First, conscientia is shared knowledge. At least since Augustine, this knowledge is said to be shared between particular human agents and God. Second, conscientia concerns the specific (moral) value of an action. Even more, as Aquinas maintains, actions acquire their rationality and normativity only by being subject to conscientia. On this basis, later scholastics thirdly defined conscientia as a kind of practical knowledge. As such, conscientia is in some sense the cause of what it understands. Put in late scholastic terms, it is the formal cause of its moral being (esse morale). This account of the meaning of 'conscientia' will be shown to be largely compatible with the Cartesian use of the term; the only change to be made being that it deals with thoughts (cogitationes) and their specific value rather than with actions. Hence for Descartes, consciousness is a kind of practical knowledge about thoughts that is shared with an ideal observer (God) and that causes the specific value of the thought that is its object. 3. This reading has several important implications. For instance, it provides us with a reason for the claim that the consciousness is not itself a thought of the thinker who has it. Our the consciousness turns something into a thought by taking it as its object and thereby endowing it with the specific value that it has as a thought. This value might be truth, correctness, adequacy or something along these lines. Now every particular judgment of value can itself be false, incorrect, or inadequate. Hence, every particular reflexive thought would itself be subject to a further consciousness. The only conscientia that can stop this regress is Gods knowledge of our thoughts. This knowledge cannot be wrong. As a consequence, the suggested reading directs us away from the assumption that the mind contains only incorporeal thoughts that are privately known to the thinker. As for the first, Descartes himself claims that most of our thoughts depend on the body. The object of our consciousness may then be some event happening in our brain. Consciousness turns this event into something that is also in some respect incorporeal by endowing it with a value. As thought, it is then not a mere corporeal thing. (The modern reader may add: as thought, but not as bodily event, it is equivalent with other brain events.) As for the second part of the above claim, the Cartesian mind must be radically public, since we always share our conscientia with an ideal observer. Finally, we come to see why Descartes proceeds so easily from his cogito, sum to a proof of the existence of God. Since every thought must be subject to a conscientia, there must always have been an ideal observer. God's existence can be shown because it must already have been presupposed. In fact, the Cartesian meditator was never alone.

Descartes’ metaphysics lays the foundation for the special sciences, and the notion of consciousness (conscientia) belongs to metaphysics rather than to psychology. I argue that as a metaphysical notion, ‘consciousness’ refers to an epistemic version of moral conscience. As a consequence, the activity on which science is based turns out to be conscientious thought. The consciousness that makes science possible is a double awareness: the awareness of what one is thinking, of what one should be doing, and of the possibility of a gap between the two

Niklas Luhmann verwendet in seiner soziologischen Systemtheorie offenbar etwas, das er den Büchern des englischen Mathematikers George Spencer Brown entnimmt. Dessen Formenkalkül ist für Luhmann, wie Günther Schulte treffend bemerkt, “Mädchen für alles, mit dem er nicht nur in der Lage ist Teezukochen, sondern auch Auto oder Straßenbahn zu fahren”. Der erste Blick in Spencer Browns Laws of Form vermittelt einen anderen Eindruck: nichts scheinen sie mit soziologischer Systemtheorie zu tun zu haben. Der vorliegende Text bearbeitet hieran anknüpfend eine recht bescheidene Frage, die sich gleichwohl jedem Luhmann-Leser schon einmal gestellt haben dürfte: Was wollen die Laws of Form und was will Luhmann mit ihnen? Als Antwort ergibt sich, nach Zurückverfolgung der relevanten Fußnoten, eine gute und eine schlechte Nachricht. Die schlechte Nachricht ist, daß die Lektüre der Laws of Form offenbar niemandem wirklich weiterhelfen kann, auch Luhmann selbst nicht. Die gute ist folglich, daß dem Luhmann-Leser die Notwendigkeit erspart bleibt, einen so dunklen, weil sparsamen Kalkül zu verstehen. Das meiste nämlich, was Luhmann den Laws of Form angeblich entnimmt, steht auf den zweiten Blick nicht darin. Er wird es also ohnehin durch andere Texte begründen müssen.

This is partly a book about Aristotle’s four causes (material, formal, efficient, and final cause), partly a systematic discussion of the relation between form and matter, causation, and teleology. Its overall aim is to show that the four causes form a system, so that the form of a natural thing relates to its matter as the final cause of a natural process relates to its efficient cause. It reaches two highly distinctive conclusions. The first is that the formal cause or essence of a thing is not a property but a generic thing. The second is that the final cause of a process is not its purpose but the course that processes of its kind typically take.

This chapter proceeds in five steps. First, we will describe and justify the structure of the traditional system of species classification. Second, we will discuss three formal principles governing the development of taxonomies in general. It will emerge that, in addition to these formal principles, a division of living beings must meet certain empirical constraints. In the third section, we will show that the traditional division of living beings into species best meets these constraints. Fourth, we will argue that a taxonomic system based on this notion of species provides a more natural alternative to the many arbitrary classifications that are possible. Hence, the traditional classificatory system is also the most natural one. Finally, we will discuss and reject an alternative account that suggests defining species solely with a view to their evolutionary history. We will argue that taxonomic trees do not depict hereditary connections but, rather, something else.

Although Descartes is often said to have coined the modern notion of ‘consciousness’, he defines it neither explicitly nor implicitly. This may imply (1) that he was not the first to use ‘conscientia’ in its modern, psychological sense, or (2) that he still used it in its traditional moral sense. In this paper, I argue for the latter assumption. Descartes used ‘conscientia’ according to the meaning we also find in texts of St. Paul, Augustine, Aquinas and later scholastics. Thus the Cartesian conscientia is, technically speaking, a shared knowledge of the specific value of our thoughts as thoughts and at the same time the cause of this value. This means that it is not itself a kind of individual knowledge, awareness, or a particular thought. Rather, ‘conscientia’ refers to the evaluative knowledge of an ideal observer

Obwohl 'conscientia' ein zentraler Grundbegriff der cartesischen Metaphysik ist, sagt Descartes nirgends explizit, was er damit meint. Auch aus der Art und Weise, in der er das Wort verwendet, lässt sich dessen Bedeutung nicht vollends erschließen. Insbesondere handelt es sich nicht um einen reflexiven Denkakt (cogitatio), nicht um eine Disposition zum Haben solcher cogitationes und nicht um eine Art Aufmerksamkeit. Um die Bedeutung des Begriffes zu klären, schlage ich vor, auf klassische Texte von Augustinus, Thomas von Aquin und jesuitischen Autoren zurückzugreifen. Es ergibt sich, dass man unter der conscientia traditionell ein Wissen um den moralischen Wert einer Handlung verstand, das der Handelnde mit einem idealen Beobachter (d.i. Gott) teilt. Ich behaupte, dass sich diese Begriffsbestimmung mehr oder weniger analog auf Descartes übertragen lässt. Die cartesische conscientia ist demnach ein Wissen um den spezifischen Wert eines Gedanken, das der Denker mit einem idealen Beobachter teilt.