E. J. Lowe

(1950 - 2014)

La connaissance métaphysique est accessible et nous possédons un tel type de connaissance. Il faut pratiquer la métaphysique de manière directe, sans passer par des considérations de philosophie du langage ou de l'esprit. Les deux principales critiques de la métaphysique sont : le naturalisme évolutionniste et le kantisme. Le naturalisme est incohérent car il nie la possibilité défaire des hypothèses métaphysiques et pourtant il repose sur de telles hypothèses. Kant également ne va pas au bout de son projet, car on ne peut éviter la question du contenu des pensées, une fois qu'on a réduit la métaphysique à une théorie de la connaissance. L'examen des arguments de Barcan-Kripke confirme la possibilité d'une argumentation métaphysique et l'impossibilité d'y échapper. Metaphysical knowledge is accessible and indeed, we have such a knowledge. Metaphysics shoud be done directly, without starting with considerations of philosophy of language or philosophy of mind. The two main critiques of metaphysics are evolutionary naturalism and Kantianism. Naturalism is inconsistent because it denies any possibility to make metaphysical hypotheses, but it hinges upon such hypotheses. Kant is also inconsistent because one cannot avoid the question of the content of thoughts once metaphysics has been reduced to epistemology. A scrutiny of the arguments by Barcan and Kripke confirms the possibility of a purely metaphysical argumentation and the impossibility to do without it.

It has long been debated whether objects are ‘sortally’ individuated. This paper begins by clarifying some of the key terms in play—in particular, ‘sortal’, ‘individuation’, and ‘object’. The term ‘individuation’ is taken to have both a cognitive and a metaphysical sense, in the former denoting the singling out of an object in thought and in the latter a determination relation between entities. ‘Sortalism’ is defined as the doctrine that only as falling under some specific sortal concept can an object be successfully singled out in thought. It is argued that such a view is too strong, but that a weaker one, ‘categorialism’, can be defended, this implying that a thinker cannot successfully single out an object in thought without having at least an implicit grasp of the criterion of identity that the object satisfies.

Locke notoriously included number amongst the primary qualities of bodies and was roundly criticized for doing so by Berkeley. Frege echoed some of Berkeley's criticisms in attacking the idea that ‘Number is a property of external things’, while defending his own view that number is a property of concepts. In the present paper, Locke's view is defended against the objections of Berkeley and Frege, and Frege's alternative view of number is criticized. More precisely, it is argued that numbers are assignable to pluralities of individuals. However, it is also argued that Locke went too far in asserting that ‘Number applies itself to ... everything that either doth exist, or can be imagined’.

This chapter formulates and argues for a version of the causal theory of perception that is incompatible with disjunctivism, and defends it against criticisms typically levelled at such a theory by disjunctivists, such as that it promotes scepticism and that it is unfaithful to the phenomenology of perception. It argues that far from disjunctivism being ontologically less extravagant than that causal theory of perception, the reverse is true, so that all things considered, the causal theory of perception is the superior theory and disjunctivism in the philosophy of perception should be rejected.

Auf Kants berühmte Frage "Wie ist Metaphysik möglich?" wird eine bejahende Antwort gegeben - eine, die Metaphysik als eine selbständige und unentbehrliche Disziplin darstellt, deren Aufgabe es ist, das Reich der wirklichen Möglichkeiten zu erforschen. Die Begriffe der "wirklichen" oder "metaphysischen" Möglichkeit und Notwendigkeit werden verteidigt und von den Begriffen verschiedener anderer Arten von Modalität unterschieden, z.B. physischer, logischer und begrifflicher Möglichkeit oder Notwendigkeit. Es wird dargelegt, daß die Gegner der Metaphysik, von den Relativisten bis zu denen, welche die Metaphysik den empirischen Wissenschaften, der Erkenntnislehre oder der Sprachphilosophie unterordnen möchten, inkohärente Auffassungen annehmen.