In this paper I argue against the claim, recently put forward by some philosophers of biology and evolutionary biologists, that there can be two or more ontologically distinct levels of selection. I show by comparing the fitness of individuals with that of collectives of individuals in the same environment and over the same period of time – as required to decide if one or more levels of selection is acting in a population – that the selection of collectives is a (...) by-product of selection at the individual level; thus, talking about two or more levels of selection represents merely a different perspective on one and the same process. (shrink)

In this study two strands of inferentialism are brought together: the philosophical doctrine of Brandom, according to which meanings are generally inferential roles, and the logical doctrine prioritizing proof-theory over model theory and approaching meaning in logical, especially proof-theoretical terms.

Here I show that Sellars’ radicalization of the Kantian distinction between concepts and intuitions is vulnerable to a challenge grounded in Merleau-Ponty’s phenomenology of embodiment. Sellars argues that Kant’s concept of ‘intuition’ is ambiguous between singular demonstrative phrases and sense-impressions. In light of the critique of the Myth of the Given, Sellars argues, in the ‘Myth of Jones’, that sense-impression are theoretical posits. I argue that Merleau-Ponty offers a way of understanding perceptual activity which successfully avoids both the Myth of (...) the Given and the Myth of Jones. I also argue that Merleau-Ponty’s approach provides an alternative to McDowell’s critique of Sellars. Merleau-Ponty shows, first, that perceptual activity can be characterized as having a unity and structure of its own which is importantly different from that of concepts; secondly, that the unity and structure of perception can be revealed phenomenologically rather than as a theoretical posit. (shrink)

The chief aim of this thesis is mobilizing parts of the work of Wilfrid Sellars in order to reconsider the notion of medium in relation to the ones of language and thought and, per extension, conception and mind. Indeed, the account of the notion of medium is constructed as a generalization of the case of language, as described in its rapport with thought, in Sellarsian philosophy. The thesis tries to position the medium as a pivot point of articulation between epistemology (...) and ontology, mostly by using as a blue-print the Sellarsian articulation of the two through the Manifest and Scientific Images. We consider Sellars’ project of accounting for the normative character of language independently from conception, with his dismissal of the instrumentalist-dualist reading of the relation between language and thought as well as the purely materialist reading of the same. We then introduce the notion of thought as inner mental episodes with a treatment of the methods of postulation and observation. This finally leads us to zeroing in on the notion of medium qua an extension of the notion of language as presented up to this point, taking move from the thesis that Johanna Seibt draws out of Sellars’ work that language is the medium of conception rather than its expression. Finally, we articulate three chief characteristics of the notion of medium: synthetic function, actuality and observational capacity, each referring to terminology introduced in the course of the thesis. In the process of introducing the three features, we also face three preoccupations underlying the research from the beginning: the question of translatability or specificity of a medium, the problem of communication and the notion of empirical truth. Especially this latter point will lead us to the sketching of a natural-history of mediums based on the notion of medium-series. (shrink)