Matthieu Queloz

DNA possesses a double nature: it is both an analog chemical compound and a digital carrier of information. By distinguishing these two aspects, this paper aims to reevaluate the legally and politically influential idea that the human genome forms part of the common heritage of mankind, an idea which is thought to conflict with the practice of patenting DNA. The paper explores the lines of reasoning that lead to the common heritage idea, articulates and motivates what emerges as the most viable version of it, and assesses the extent to which this version conflicts with gene-patenting practices as exemplified by the U.S. regime. It concludes that the genome is best thought of as a repository of information to which humanity has a fiduciary relationship, and that on this view, the perceived conflict with gene-patenting largely dissolves.

In this paper, I examine Wittgenstein’s conception of reason and rationality through the lens of his conception of reasons. Central in this context, I argue, is the image of the chain, which informs not only his methodology in the form of the chain-method, but also his conception of reasons as linking up immediately, like the links of a chain. I first provide a general sketch of what reasons are on Wittgenstein’s view, arguing that giving reasons consists in making thought and action intelligible by delineating reasoning routes; that something is a reason not in virtue of some intrinsic property, but in virtue of its role; and that citing something as a reason characterises it in terms of the rational relations it stands in according to context-dependent norms. I then argue that on Wittgenstein’s view, we misconceive chains of reasons if we think of them on the model of chains of causes. Chains of reasons are necessarily finite, because they are anchored in and held in place by our reason-giving practices, and it is in virtue of their finitude that chains of reasons can guide, justify and explain. I argue that this liberates us from the expectation that one should be able to give reasons for everything, but that it limits the reach of reasons by tying them to particular reasoning-practices that they cannot themselves justify. I end by comparing and reconciling Wittgenstein’s dichotomy between chains of reasons and chains of causes with seemingly competing construals of the dichotomy, and I clarify its relation to the dichotomy between explanation and justification.

This paper situates Wittgenstein in what is known as the causalism/anti-causalism debate in the philosophy of mind and action and reconstructs his arguments to the effect that reasons are not a species of causes. On the one hand, the paper aims to reinvigorate the question of what these arguments are by offering a historical sketch of the debate showing that Wittgenstein's arguments were overshadowed by those of the people he influenced, and that he came to be seen as an anti-causalist for reasons that are in large part extraneous to his thought. On the other hand, the paper aims to recover the arguments scattered in Wittgenstein's own writings by detailing and defending three lines of argument distinguishing reasons from causes. The paper concludes that Wittgenstein's arguments differ from those of his immediate successors; that he anticipates current anti-psychologistic trends; and that he is perhaps closer to Davidson than historical dialectics suggest.