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Logic, Language, and Mind Seminar

Fridays 10-12, D700

 

Spring 2012 Organized by Peter Pagin

Date

Speaker, title, abstract


24 February


Henning Strandin


  • Interpreting Causal Claims

 

Abstract
A model M for interpreting causal claims is given, and
some truth conditions for causal claims are defined over this model. Causal claims are taken to be claims about consequences of physical law. Physical law is here understood in the purely modal sense of physical necessity, and the model suggested for interpretation models the relation of physical necessity between the sentences of the object language. The model M is a modified version of the kind of Kripke structure used in the semantics for Computation Tree Logic.

Thus, M models physically possible worlds as physically possible world histories, determined by a set of physically possible world states and a relation of physically possible state transitions. A factual causal claim "The fact that ϕ at time t caused it to be the case that ψ at t+i (for some i>0)", where "ϕ" and "ψ" indicate sentences in the object language, is understood as meaning that, in virtue of physical law, given the circumstances at t and that it was the case that ϕ at t, it had to be the case that ϕ at t+i, and had it not been the case that ϕ at t, it could not have been the case that  ψ at t+i. In short, the truth of the antecedent in the causal claim is supposed physically sufficient and necessary for the truth of the consequent at a later moment, given the background conditions.

Beyond navigating around some of the traditional issues of interpreting causal claims, a large part of the purpose of the theory is to understand how background conditions relate logically to the causal relations they enable. The theory deals initially only with singular causal claims, but something might also be said about generalization, universal causal claims, and causal laws. It has also seemed desirable to keep the theory neutral as far as possible with respect to the ontology of causal relata and the specifics of the object language.




9 March


Jonas Åkerman


Indexicals, intuitions and semantic content


Abstract
It is an uncontroversial fact that natural languages contain indexical and demonstrative expressions, like, ‘I’, ‘here’, ‘now’, and ‘that’, whose semantic content varies with certain features of the utterance situation. But what features of the utterance situation are relevant for determining the semantic contents of indexical expressions contained in the sentence uttered? This is the central question of the recent debate on indexical reference, and there are various answers on offer. Some identify the content determinative features with mental states of speakers or audiences, while others claim that only objective features of the utterance situation are semantically relevant. I shall discuss some of the arguments that have been put forward for and against these different theories. The focus will be on arguments against intentionalism, i.e. the view that the speaker’s intentions determine the semantic content of indexicals, and I shall argue against the two following general claims: (i) The central question of the debate on indexical reference can be settled by appeal to intuitions. (ii) Considerations about the connection between semantic content and communication can be invoked in order to exclude (strong) intentionalism about indexical reference. An interesting corollary is that if the methodological claims I defend are sound, there is reason to question one of the assumptions that the whole debate on indexical reference rests on, namely the assumption that there is a unique semantic content expressed in each situation where a semantic content is expressed at all.


16 March


Tor Sandqvist, KTH

Generalizing Recursive Enumerability


Abstract
The technical concept of recursive enumerability, as applied to relations among natural numbers, can be thought of as capturing at least three different informal notions: effective enumerability, effective semidecidability, and what might be called "finitary groundedness".  A generalization of the concept of recursive enumerability to arbitrary domains might take extensionally different forms depending on which one of these intuitive notions one has in mind.  The author's concept of a "vincular relation'", it will be suggested, provides a neat general notion of "finitary groundedness".


23 March


Dag Westerståhl

Common Sense About Names?


Abstract
A recent trend among philosophers and some linguists (e.g. Burge, Bach, Graff Fara, Geurts, Elbourne, Matushanski) is that names are predicates or (almost equivalently) nominal descriptions: a name 'N' is taken to stand for 'being called 'N'' or 'the one called 'N''. In this talk I'll look at some of the arguments put forward for this view. But I will end up with an untrendy defense of the common sense view that names are primarily referring expressions.


30 March


No speaker

No title


Abstract


20 April


Sara Packalén

Semantics and Pragmatics

 

Abstract
In this talk I do three things. First, I spell out what I take the semantics/pragmatics distinction to be about. Second, I map out four main positions in the contemporary debate on the issue: radical autonomous semantics, moderate autonomous semantics, moderate truth-conditional pragmatics and radical truth-conditional pragmatics. Third I discuss the motivations behind the different views, and what I take to be their most significant benefits and problems.


27 April


Matthias Schirn, Munich


Logical Abstraction and Logical Objects

 


Abstract


4 May


Workshop EuroUnderstanding CCCOM
Stockholm University
May 4, 2012, Room D271

9.30 – 10.45
Peter Pagin (Stockholm University):
When does Communication Succeed?

10.45 – 11.00
Coffee

11.00 – 12.15
Steffen Borge (Norwegian University of Science and Technology):
How to Be a Communicator

12.15 – 14.00
Lunch (Skafferiet)

14.00 – 15.15
Nat Hansen (Umeå University):
Missing the Point: Neo-Ordinary Language Philosophy and the Pragmatics of Experimental Surveys

15.15 – 16.30
Andreas Stokke (University of Lisbon):
Is the Lying-Misleading Distinction Context-Sensitive?

16.30 – 16.46
Coffee

16.45 – 18.00
Teresa Marques (University of Lisbon):
Disagreement in context: metalinguistic negation and coordination


11 May


Emma Wallin


Psychological Essentialism in Support for Semantic Internalism


Abstract
Psychological essentialism is the thesis that we are psychologically biased to presuppose kind specific essences. Roughly the theory is that although we use global similarity as a rule of the thumb in categorizing objects into kinds, we proceed under the supposition that there are underlying properties, which explain these similarities. It has been suggested that evidence for psychological essentialism supports semantic externalism (Jylkkä, Railo, and Haukioja, 2008). In opposition to this I argue, that even though semantic externalism relies on the truth of psychological essentialism (or some closely related thesis), the reversed is not the case. Psychological essentialism is compatible with semantic internalism. From this it follows, not only that psychological essentialism is independent of semantic externalism, but also that it may figure in an argument against it. The reason for this is that the hypothesis allows us to give a semantically internalist account of intuitions, commonly suggested to support semantic externalism. More specifically, it allows us to give an internalist account of the intuitions typically brought out by Putnam’s Twin Earth scenario, and Burge’s Arthritis-in-the-thigh-scenario.


25 May



Ivan Kasa


Grundlagen 64: Aboutness in Abstraction Principles

Abstract
I propose a new account of content carving, where Fregean abstraction is a method of re-dividing logical space embedding a proposition. For this, I appeal to Stephen Yablo’s variant of the Lewisian view on subject matters as covers of logical space, to argue that subject matters of identity statements between abstracts are trivializations of the subject matters of correlated equivalence statements. It turns out that the possibility of content carving in this sense turns on the specifics of identity and equivalence, in a way that accords surprisingly well with Frege’s rather cryptic remarks in Gl64. Moreover, Yabloan subject matters of the conceptually richer identity statements between abstracts are included in the subject matters of their conceptually less demanding equivalents under Fregean principles of abstraction. This can be taken to support the neo-Fregean contention that abstraction is ontologically and conceptually revealing without being ontologically inflationary. Thirdly, key ingredients of standard solutions to Caesar-type problems, usually invoked ad hoc, can now be reached abductively from the requisite subject matter inclusion relations. To view abstraction as content carving has therefore substantial advantages over a less constrained understanding of abstraction as implicit definition.