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18. Thought / A. Modes of Thought / 9. Indexical Thought

[thought which depends on a particular perspective]

19 ideas
Thoughts about myself are understood one way to me, and another when communicated [Frege]
     Full Idea: When Dr Lauben thinks he has been wounded, ..only Dr Lauben can grasp thoughts determined in this way. But he cannot communicate a thought which only he can grasp. To say 'I have been wounded' he must use 'I' in a sense graspable by others.
     From: Gottlob Frege (The Thought: a Logical Enquiry [1918]), quoted by François Recanati - Mental Files 16.1
     A reaction: [compressed] This seems to be the first, and very influential, attempt to explain the unusual and revealing semantics of indexicals. It seems to be the ultimate source of 2-D semantics, by introducing two modes of meaning for one term.
Indexical thoughts are about themselves, and ascribe properties to themselves [Perry, by Recanati]
     Full Idea: Perry's newer token-reflexive framework says indexical thoughts have token-reflexive content, that is, thoughts that are about themselves and ascribe properties to themselves. …They relate not to the subject, but to the occurrence of a thought.
     From: report of John Perry (Reference and Reflexivity [2001]) by François Recanati - Mental Files 18.1
     A reaction: [There seem to be four indexical theories: this one, Recanati's, the earlier Kaplan-Perry one, and Lewis's] Is Perry thinking of second-level thoughts? 'I'm bored' has the content 'boredom' plus 'felt in here'? How does 'I'm bored' refer to 'I'm bored'?
Lewis's popular centred worlds approach gives an attitude an index of world, subject and time [Lewis, by Recanati]
     Full Idea: Many philosophers now prefer Lewis's centred worlds framework for indexicals …It is two-dimensional, saying an attitude only has a truth-value when evaluated with respect to a contextual index, containing a subject and time, as well as a world.
     From: report of David Lewis (Attitudes De Dicto and De Se [1979]) by François Recanati - Mental Files 18.2
     A reaction: [compressed; this is said to have largely ousted the older Kaplan-Perry view] You only begin to understand the possible worlds game when you see how many problems find proposed 'solutions' there.
Indexical thought is in relation to my self-consciousness [McGinn]
     Full Idea: Very roughly, we can say that to think of something indexically is to think of it in relation to me, as I am presented to myself in self-consciousness.
     From: Colin McGinn (Subjective View: sec qualities and indexicals [1983], 2)
     A reaction: So it is characterised relationally, which doesn't mean it has a distinctive intrinsic character. If I'm lost, and I overhear someone say 'Peter is in Hazlemere', I get the same relational information (in a different mode) without the indexicality.
Indexicals do not figure in theories of physics, because they are not explanatory causes [McGinn]
     Full Idea: Indexicals are like secondary qualities in not figuring in causal explanations of the interactions of objects: physics omits them not because they are relative and egocentric, but because they do not constitute explanatory predicates of a causal theory.
     From: Colin McGinn (Subjective View: sec qualities and indexicals [1983], 2)
     A reaction: They are outside explanatory physics, but not outside explanation. The object moved because a force acted on it; or the object moved because I wanted it moved.
The indexical perspective is subjective, incorrigible and constant [McGinn]
     Full Idea: I attribute three properties to the indexical perspective: it is subjective, incorrigible, and constant.
     From: Colin McGinn (Subjective View: sec qualities and indexicals [1983], 5)
     A reaction: That is as good an idea as any for summarising the view (associated with John Perry) that the indexical perspective is an indispensable feature of reality. For a good attack on this, which I favour, see Cappelen and Dever.
Indexical concepts are indispensable, as we need them for the power to act [McGinn]
     Full Idea: The present suggestion is that indexical concepts are ineliminable because without them agency would be impossible: when I imagine myself divested of indexical thoughts employing only centreless mental representations, I am deprived of the power to act.
     From: Colin McGinn (Subjective View: sec qualities and indexicals [1983], 6)
     A reaction: A nice clear statement of the view developed by Perry and Lewis. I agree with Cappelen and Dever that it is entirely wrong, and that indexical thought is entirely eliminable, and nothing special.
Indexicals may not be objective, but they are a fact about the world as I see it [Chalmers]
     Full Idea: Even if the indexical is not an objective fact about the world, it is a fact about the world as I find it, and it is the world as I find it that needs explanation.
     From: David J.Chalmers (The Conscious Mind [1996], 1.2.5)
     A reaction: Chalmers treats them as important, whereas the way he expresses it could make them eliminable, if the world seen by him is eliminable.
Indexicals apply to singular thought, and mental files have essentially indexical features [Recanati]
     Full Idea: I defend the applicability of the indexical model to singular thought, and to mental files qua vehicles of singular thought. Mental files, I will argue, possess the essential features of indexicals.
     From: François Recanati (Mental Files [2012], 05.1)
     A reaction: I love mental files, but am now (thanks to Cappelen and Dever) deeply averse to giving great significance to indexicals. A revised account of files will be needed.
Indexicality is closely related to singularity, exploiting our direct relations with things [Recanati]
     Full Idea: Singularity and indexicality are closely related: for indexicals systematically exploit the contextual relations in which we stand to what we talk about.
     From: François Recanati (Mental Files [2012], 2.2)
     A reaction: Recanati builds a nice case that we may only have an ontology of singular objects because we conceptualise and refer to things in a particular way. He denies the ontology, but that's the bit that interests me.
Indexicality is not just a feature of language; examples show it also occurs in thought [Recanati]
     Full Idea: People once took indexicality to be exclusively a property of language, ....but a series of examples seemed to establish that the thought expressed by uttering an indexical sentence is itself indexical (and is thus 'essential').
     From: François Recanati (Mental Files in Flux [2016], 6.1)
     A reaction: Perry's example of not realising it is him leaking the sugar in a supermarket is the best known example. Was this a key moment for realising that philosophy of thought is (pace Dummett) more important than philosophy of language?
How can we communicate indexical thoughts to people not in the right context? [Recanati]
     Full Idea: Indexical thoughts create an obvious problem with regard to communication. How can we manage to communicate such thoughts to those who are not in the right context?
     From: François Recanati (Mental Files in Flux [2016], 7.1)
     A reaction: One answer is that you often cannot communicate them. If I write on a wall 'I am here now', that doesn't tell the next passer-by very much. But 'it's raining here' said in a telephone call works fine - if you know the location of the caller.
If two people can have phenomenally identical experiences, they can't involve the self [Brogaard]
     Full Idea: It is plausible that you and I can have perceptual experiences with the same phenomenology of two trees at different distances from us (perhaps at different times). ..So our perceptual experiences cannot contain you or me in the content of representation.
     From: Berit Brogaard (Perceptual Content and Monadic Truth [2009], p.223), quoted by Cappelen,H/Dever,Josh - The Inessential Indexical 08.2
     A reaction: If you accept the example, which seems reasonable, then that pretty conclusively shows that perception is not inherently indexical.
It is assumed that indexical content is needed to represent the perspective of perception [Cappelen/Dever]
     Full Idea: Because our perceptual states typically represent the world as seen from a perspective, it is sometimes thought that some distinctively indexical kind of content is needed to characterise those states.
     From: Cappelen,H/Dever,Josh (The Inessential Indexical [2013], 01.4)
     A reaction: They are summarising this view precisely so that they can oppose it, and I think they are right.
Indexicality is not significantly connected to agency [Cappelen/Dever]
     Full Idea: There are no interesting or distinctive explanatory connections between indexicality and agency.
     From: Cappelen,H/Dever,Josh (The Inessential Indexical [2013], 01.8)
If some of our thought is tied to its context, it will be hard to communicate it [Cappelen/Dever]
     Full Idea: It is bad news if some of our contents are essentially tied to particular contexts. ...If information needs to be assessed relative to some ur-context, later recipients won't know what to do with it.
     From: Cappelen,H/Dever,Josh (The Inessential Indexical [2013], 10)
All information is objective, and purely indexical information is not much use [Cappelen/Dever]
     Full Idea: Fundamentally, all information is objective information. ...[176] What we want is fully portable information, and information that co-ordinates on the world, rather than on us, is best suited for the task.
     From: Cappelen,H/Dever,Josh (The Inessential Indexical [2013], 10)
     A reaction: I agree entirely with their thesis. We just pick up information about ourselves, such as who and where we are, which is just like equivalent information about other people. It is isn't a special type of information.
You don't remember your house interior just from an experienced viewpoint [Cappelen/Dever]
     Full Idea: When you recall the look of the inside of your house ....where things are relative to one another is what persists in memory, not where they were relative to you when seen.
     From: Cappelen,H/Dever,Josh (The Inessential Indexical [2013], 10)
     A reaction: This seems to be a very telling example, though you could postulate some system which converts perspectival input into objective information. But why bother? We seek objective information, not perspectives.
Our beliefs and desires are not organised around ourselves, but around the world [Cappelen/Dever]
     Full Idea: Our view on the world is not primarily a view from a perspective. Our beliefs and desires are not organized around us. They are instead organized around the world itself. Our view is a view from everywhere.
     From: Cappelen,H/Dever,Josh (The Inessential Indexical [2013], 10)
     A reaction: Slipping in the claim that our desires are also organised around the world is not quite as persuasive as the claim about beliefs. If you want to draw a freehand straight line, focus on the far end of it. The world will guide your hand.