Online research in philosophy

We have become accustomed to the idea that meaning is determined externalistically, that the meaning of certain types of terms, for example natural kind terms, depends on facts about the external environment.1 Recently, however, a more radical thesis has emerged, a thesis we shall dub.

Sie halten gerade ein Buch in Ihren H¨anden. Vielleicht liegt es auch auf dem Tisch vor Ihnen, w¨ahrend Sie diese Worte lesen. Aber woher wissen Sie, dass Sie ein Buch vor sich haben? Nun, Sie sehen es nat¨urlich mit eigenen Augen. Vermutlich f¨uhlen Sie auch das Gewicht des Buches, das gegen Ihre Haut dr¨uckt, w¨ahrend sie es in H¨anden halten, und h¨oren das Rascheln der Seiten, wenn Sie umbl¨attern. Dar¨uber hinaus sind Sie wach und (so vermuten wir mal) einigermaßen n¨uchtern, (...) also in einem Zustand, in dem Sie f¨ur gew¨ohnlich Ihren Sinnen vertrauen. Da Sie von diesen zuverl¨assigen Quellen, die Sie st¨andig ¨uber Sie und Ihre Umgebung auf dem Laufenden halten, mit diesen Informationen ¨ubersch¨uttet werden und da diese zuverl¨assigen Quellen Ihnen nun mitteilen, dass Sie ein Buch in H¨anden halten, hegen Sie dar¨uber nicht den geringsten Zweifel. (shrink)

Recent debates about thought experiments have focused on a perceived epistemological problem: how do thought experiments manage to provide knowledge when they yield no new empirical data? A bold answer to this question is provided by James Robert Brown’s platonisrn, according to which a certain class of thought experiments allow a sort of intellectual perception of laws of nature, understood as relations between universals. I suggest that there are three main problems with platonism. First, it is restricted to a very (...) small class of thought experiments; hence, it largely fails to address the general epistemological problem. Second, it is not quite clear what it is supposed to explain. Third, its explanatory value in any case seems dubious, since the mechanisms it postulates (i) appear to raise issues more ditficult than what they would explain, and (ii) seem to obviate the very need for conducting thought experiments. I also argue that it fails to give an accurate account of Brown’s flagship example, Galileo’s thought experiment on falling bodies. In conclusion, I suggest that although platonism about thought experiments is an exciting thesis, it is at present unconvincing. (shrink)

It is widely held that the meaning of certain types of terms, such as natural kind terms, is individuated externalistically, in terms of the individual's external environment. Recently a more radical thesis has emerged, a thesis we dub 'a posteriori semantics.' The suggestion is that not only does a term's meaning depend on the external environment, but so does its semantics. One motivation for this is the aim to account for cases where a putative natural kind term fails to pick (...) out a natural kind: The term may have a standard externalist semantics (if it picks out a natural kind) or a more descriptivist one (if it does not). Knowing which semantics applies will therefore require detailed empirical knowledge. This move has also been employed in cases where a singular term, such as a name, fails to have a reference. We argue that a posteriori semantics is inherently implausible, since the type of semantics common terms should be given ought not to be conditional on details of chemistry or physics. A number of difficulties for the position—'metaphysical,' epistemological, and methodological—are articulated. Finally, we suggest that a posteriori semantics misconstrues the way in which semantics is empirical. (shrink)

Two ways of characterizing natural kinds are currently popular: the Kripke-Putnam appeal to microstructure and Boyd’s appeal to causal homeostasis. I argue that these conceptions are more divergent than is often acknowledged, that they give no credence to essentialism, and that they are both faulty. In their place, I sketch an alternative view of natural kinds, which I call “bare projectibilism”. This conception avoids the appeal to explanation common to microstructuralism and the causal homeostasis view, but is still compatible with (...) scientific realism. (shrink)