All’inizio degli anni Sessanta Frank Sibley pubblicava un articolo dal titolo inequivocabile, Aesthetic and Non Aesthetic; in esso, riprendendo alcuni spunti presenti in un altro suo celebre articolo, precedente di pochi anni, il filosofo americano affrontava esplicitamente il problema del rapporto tra giudizi, qualità, descrizioni e concetti estetici e non estetici. Aveva così inizio un dibattito tra i più fecondi sviluppatisi in seno all’estetica analitica, dibattito che ancora oggi è al ce...

Amidst the progress being made in the various (sub-)disciplines of the behavioural and brain sciences a somewhat neglected subject is the problem of how everything fits into one world and, derivatively, how the relation between different levels of discourse should be understood and to what extent different levels, domains, approaches, or disciplines are autonomous or dependent. In this paper I critically review the most recent proposals to specify the nature of interdiscourse relations, focusing on the concept of supervenience. Ideally supervenience (...) is a relation between different discourses which has all the advantages of reduction, but without its disadvantages. I apply the more abstract considerations to two concrete cases: schizophrenia and colour. Usually an interlevel or interdiscourse relation is seen as asymmetrical: the overlaying discourse depends on the underlying discourse (and not vice versa), where the out- or un-spoken assumption is that the ultimate underlying discourse is physical. Instead I argue that scientific categories referred to in interdiscourse relations are, ultimately, dependent on common sense categories and common sense normative criteria. It is the manifest categories and common sense ideas about what is reasonable and what is right that determine the relevant categorisations at the deeper, underlying levels. I suggest that the implications of this are not merely methodological or epistemological. (shrink)