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Abstract
In this paper I offer a reconstruction of one of Husserl’s various anti-materialist arguments. Husserl hints at this argument in Ideas II & III where he exposes essential differences between mental and material reality (Realität). At its core, Husserl claims that mental entities by their very essence can never be in the same qualitative condition at different times. By sharp contrast, for purely material or physical entities such a cyclical development is not essentially excluded. Accordingly, I will speak of Husserl’s argument from irreversibility. I argue that this argument is modal in nature, and that it can be used to make a case against materialism based on the necessary supervenience of the mental on the physical. My primary goal is to elucidate this argument, and to offer a logical reconstruction using basic modal logic and contemporary notions of supervenience. I conclude that Husserl’s argument is formally valid, and that it can even held to be sound, although the premise regarding the necessary irreversibility of the mental requires further clarification.
Abstract
In this essay, I discuss three readings of Descartes’ Meditations. According to the first reading, “I exist” is for Descartes the foundation of our knowledge. This reading is dismissed on the grounds that, in his view, as long as God’s existence is not proven there is a good reason to doubt this proposition. Proponents of the second reading claim that there are two kinds of Cartesian knowledge: perfect and imperfect knowledge. The meditator has imperfect knowledge of “I exist” before God’s existence is proven. Subsequently, she acquires perfect knowledge of various metaphysical theorems. This reading is repudiated, too. I argue for a third reading, according to which “I think” – and not “I exist” – is the foundation of our knowledge.