In the fifth chapter of Frank Jackson’s book From Metaphysics to Ethics, he endeavors to offer a (naturalistic) ‘account of how the ethical gets a place in the descriptive picture of what our world is like’ as a response to what he calls ‘the location problem’.[1] Jackson’s theory for how the ethical supervenes on the descriptive, which he takes to be ‘a priori true and necessary’ from the perspective of folk morality, is the crux of his argument.[2] In this paper I cast doubt on the truth of Jackson’s supervenience theory such as to demand further clarity and justification. Assuming Jackson has rightly identified the location problem that he is up against, I argue that Jackson’s proposal lacks a sufficient consistency.
This paper will be structured around the following two sections: The bulk of the work will be in section one which will be devoted to elucidating Jackson’s response to what he takes the location problem to be. In the second section, I raise my concern about the truth of Jackson’s supervenience theory in the form of a dilemma: I highlight two main ways to view Jackson’s theory (which I think he confuses) that are mutually exclusive yet individually inconsistent with the rest of Jackson’s response to the location problem.
Jackson’s Location Problem and His Solution
At the outset, let us be clear about the context that drives Jackson to the location problem. In addition to being a naturalist, Jackson is a cognitivist, which is to say he thinks moral claims are truth-apt – in other words, he thinks moral claims can be assigned a truth value. Hence, the proposition ‘murder is wrong’ can be deemed either true or false, and as such it is not simply an expression of an ethical attitude analogous to ‘boo for murder’. For Jackson, ‘truth-apt sentences…are those that, by virtue of the way they are used by speakers and writers, make a division among the possibilities into those that are in accord with how they represent things as being, and those that are not in accord with how they represent things as being; and the sentences are true just when things are as they represent them as being.’[3] Jackson’s brand of cognitivism is meant to be compatible with ‘extreme subjectivism’ which would say that if S says ‘X is good’ it is true if and only if S’s ‘immediate reaction to X is one of approval’.[4] That said, extreme subjectivism should not be confused with non-cognitivist theories like emotivism; both extreme subjectivism and emotivism agree that propositions like ‘X is good’ express a non-cognitive attitude but according to extreme subjectivism, unlike emotivism, such propositions are none the less considered truth-apt.[5]
Given cognitivism, one is inclined to ask: What and where are the references of ethical propositions that make them truth-apt? What and where are ethical properties? The specific location problem that Jackson is concerned with, however, is finding a place for the ethical in ‘the descriptive picture of what the world is like’.[6] For Jackson, the location problem is finding out how ‘matters described in one vocabulary are made true by matters described in another’; which is to say, Jackson is concerned with how our ethical vocabulary is made true by the descriptive picture of the world.[7] So, as it were, Jackson is not as interested in the metaphysics of locating ethical properties in the ‘natural or physical sciences’, but instead his primary concern involves locating and clarifying what role ethical properties play within language.[8]
Connecting Ethical Properties with Descriptive Properties: In looking for how the ethical gets a place in the descriptive picture, Jackson first turns to considering what is meant by ‘the ethical’. What is being claimed in ethical statements? The recurring mantra in Jackson’s paper that drives his answer is ‘we are entitled to mean what we like by our words. But if we wish to address the concerns of our fellows when we discuss the matter…we had better mean what they mean.’[9] The folk conception of morality is the base from which he considers ethical claims as he moves toward connecting ethical properties with descriptive properties. For Jackson, the proposition ‘X is good’ means that X has what we, the folk, consider a goodness property to be. ‘It is, thus, folk theory that will be our guide in identifying rightness, goodness, and so on.’[10]
Within folk morality, Jackson considered the notion that ‘the ethical way things are supervenes on the descriptive way things are’ to be the ‘most salient and least controversial part’, and as such he argues that the nature of this supervenience ‘tells us that ethical properties are descriptive properties.’[11] To state this relationship more precisely, Jackson provides us with the following supervenience theory:
Ethical/Descriptive Supervenience (SV): ‘For all [worlds] w and w*, if w and w* are exactly alike descriptively then they are exactly alike ethically.’[12]
which he considers to be ‘both a priori true and necessary’.
So, starting with folk morality (as a means to understand what ethical properties are) and accordingly developing SV, Jackson wants to argue that the relationship between ethical properties and descriptive properties is so close that ethical properties (simply) are descriptive properties. But what are descriptive properties and what counts as descriptive vocabulary? Generally, Jackson takes descriptive properties and terms to be those we consider to be on the ‘is’ side of the is-ought distinction, but beyond that, Jackson is not terribly specific nor does he think he needs to be.[13] He will not allow for a large ‘semantic divide’ between the ethical and the descriptive, but it is not terribly important where exactly we draw the line (Jackson is willing to play it safe and take any terms that are arguably not ‘purely descriptive’ off the list of descriptive terms). Regardless of how exactly (within reason) the distinction between the ethical and the descriptive is made, Jackson argues, from SV, that even if we put aside our ethical terminology, purely descriptive terms can establish the same ascriptions as we would have had with the ethical terminology; that is ‘for any ethical predicate there is a purely descriptive one that is necessarily co-extensive with it.’[14]
To advance this thesis, Jackson argues that once given SV (as it is, apparently, both a priori and necessary), then for any ethical sentence E: 1) it will be composed of both ethical and descriptive terminology (as Jackson simply says, ‘ethical nature without descriptive nature is impossible), 2) in all worlds in which E is true those worlds will have some ethical nature, and 3) if E is true in w but not true in w*, then w and w* differ ethically. [15] As such, Jackson can provide the following co-extension argument:
Jackson’s Co-Extension Argument: ‘Now let w1, w2, etc. be the worlds where E is true, and let D1, D2, etc. be purely descriptive sentences true at w1, w2, etc., respectively, which give the full descriptive nature of w1, w2, etc. Then the disjunct of D1, D2, etc. will also be a purely descriptive sentence, call it D. But then E entails and is entailed by D. For every world where E is true is a world where one or other of the Di are true, so E entails D. Moreover every world where one or the other of the Di are true is a world where E is true, as otherwise we would have a violation of [SV]: we would have descriptively exactly alike worlds differing in ethical nature. Therefore, D entails E.’[16]
Since the ethical is co-extensive with the descriptive, such that any distinction that is made ethically can also be made with the purely descriptive, Jackson concludes that ‘ethical properties are descriptive properties.’ [17]
Now, co-extension certainly doesn’t necessarily mean equivalence. It is, of course, a logical possibility that the ethical properties could be entirely different properties that just happen to be wholly co-extensive with descriptive properties, but such a view, according to Jackson, seems to be ‘an absurdly anti-Occamist multiplication of properties.’[18] Besides, even if we did multiply properties by requiring the ethical to pick out something distinct from descriptions, how ethically significant would such an additional property be?[19] For Jackson, it seems ridiculous to allow for the possibility that a certain action, A, may cause a large number of people to die slow and painful deaths, but since A lacks a certain additional ethical property it is morally irrelevant whether or not an agent does A.[20] Intuitionally, our ethical assessment relies on the descriptive. Something indeed seems quite wrong if it is possible to construct a gruesome scenario using only purely descriptive terms (lacking any special ethical properties), which is ethically inconsequential.
For Jackson, ethical terms are analogous to terms like ‘baldness’. The same ascription made by ‘baldness’ could be made with a long disjunction of descriptions of hair distributions; likewise, the same ascription made by ‘goodness’ could be made with a long disjunction (perhaps infinitely long) of the pertinent purely descriptive terms identified by folk morality. [21] The reason we have terms like ‘bald’ and ‘good’ is because we are finite creatures and such terms are easier for us to communicate and cognitively grasp. Additionally, as ‘baldness’ can illustrate, there is asymmetry between the ethical and the descriptive even though they are co-extensive. A thorough mapping of someone’s hair-distribution highly constrains whether or not they can be deemed ‘bald’ or not; conversely, however, to describe someone as bald leaves open many possibilities of how exactly to be bald. Likewise, a thorough account of the descriptive properties of a world will highly constrain the ethical properties of the world; however, a full account of the ethical properties in the world is ‘consistent with indefinitely many different descriptive natures, concerning, say, how certain distant and ethically insignificant electrons are moving.’[22]
Before moving on, let us, for clarity’s sake, catalog Jackson’s argument thus far in terms of premises and conclusion:
- If we want to mean what ‘our fellows’ mean, then we need to refer to folk morality.
- If we are working from within folk morality, then we have SV
- Therefore, ethical properties are descriptive properties (from 2; developed using Jackson’s Co-Extension Argument).
According to Jackson, this argument works ‘prior to metaphysics.’[23] That is to say, the cognitivist can utilize this argument from supervenience before any metaphysical commitments have been made. Whether there are any indeed any instantiated ethical properties is a side issue; Jackson has not yet committed himself to either Realism or Error theory.
How do we know which ethical properties go with which descriptive properties?: Let us now first briefly look at how Jackson’s theory can be put into practice and see how he proposes we know which ethical properties go with which descriptive properties. Staying in accord with his established precedence of championing folk morality, Jackson’s methodology for matching the ethical with the descriptive is moral functionalism. Moral functionalism is ‘the view that the meaning of the moral terms are given by their place in this network of input, output and internal clauses that make up folk morality’; that is to say, moral terms have their meaning from the context of folk morality: In folk morality we have purely descriptive situations, the input, that we process into ethical descriptions, and how these assorted ethical descriptions and bits of normative language are inter-connected are, when articulated, the internal role clauses.[24] Finally, when we, the folk, move from ‘ethical judgments to facts about motivation and thus behavior’ that is the output of folk morality. [25] Though there seems to be a natural flow from input clauses to internal role clauses to output clauses, Jackson sees these components of folk morality simply as principles that ‘tell us which properties typically go together’ and not as theory of causality.
To be sure, folk morality, and accordingly how moral functionalism connects the ethical with the descriptive, is in flux, it is ‘currently under negotiation’.[26] Though there is a great deal in morality that seems to be universally agreed upon, i.e. that killing another human for sheer pleasure is wrong, there are still many points of contention and debate. As folk morality changes and evolves, Jackson sees it developing into one or more mature folk moralities. Jackson admits that the ethical may not be objective; as the moral debates continue we, the assorted folk of the world, may not decide on one mature folk morality but multiple ones.[27] Though we arrive at SV from folk morality, and though all worlds that are identical descriptively are suppose to be identical ethically, Jackson is willing to allow for the possibility of multiple mature folk moralities.[28]
A Descriptive Dilemma
My concern for Jackson’s solution to the location problem stems from the fact that I struggle to see how SV can be true without being inconsistent with the rest of Jackson’s paper, and this concern is exacerbated since the whole of Jackson’s argument rests on SV’s truth.[29] To review, let us look at SV again:
Ethical/Descriptive Supervenience (SV): ‘For all [worlds] w and w*, if w and w* are exactly alike descriptively then they are exactly alike ethically.’[30]
which, again, Jackson takes as ‘a priori true and necessary’. In this final section, I propose that there are two distinct ways of reading Jackson’s theory for how the ethical supervenes on the descriptive. Since both readings are mutually exclusive, I set up a dilemma by arguing that neither reading is consistent with the rest of Jackson’s solution to the location problem.
The ambiguity in SV is elucidated by the question, ‘who is doing the describing?’ I propose two main answers:
Exhaustive SV: For all [worlds] w and w*, if w and w* are exactly alike in their exhaustive descriptions then they are exactly alike ethically.
Folk SV: For all [worlds] w and w*, if w and w* are exactly alike in the way the folk describe them then they are exactly alike ethically.
The descriptions of the worlds in Exhaustive SV are meant to be, as you might have guessed, exhaustive; proverbially a God’s-eye view of the world. In contrast, the descriptions in Folk SV are meant to be more limited to the extent folk can describe the world; folk, arguable, will struggle to ever provide an exhaustive description of even the physical aspects of the world, let alone any immaterial or metaphysical aspects. While there are other possible versions of SV that could be provided (i.e. ‘…if w and w* are exactly alike in the way angels, philosophers, goldfish etc. describe them then…’), I believe Exhaustive SV and Folk SV compose all of the pertinent options. Since there is little reason to think that the folk description of the world is exhaustive, Exhaustive SV and Folk SV are mutually exclusive.
Why does Jackson think that SV is a priori true and necessary? To quote form Jackson’s ‘Précis of From Metaphysics to Ethics’, he must think SV is a priori insofar as it is ‘knowledge we can have independently of how things actually are’ and necessary insofar as we can know it in all possible worlds.[31] Whether or not SV actually meets this requirement will depend on who is doing the describing. Exhaustive SV indeed seems to be conceptually true no matter ‘how things actually are’. If the description of the world is indeed fully exhaustive it is hard to see how any change in the ethical nature wouldn’t trigger some change in description. For example, even if the ethical reality of w and w* wholly depended on the whim of some deity, the deity couldn’t change its mind about ethics in one world without triggering a change in the exhaustive description of that world (which would include the whims of that deity) even though the folk on these respective worlds, hypothetically, would have no idea that such a change occurred.
The problem for Exhaustive SV, however, is that it seems to be a priori true and necessary completely divorced from folk morality or language, which is the foundation Jackson intended for it.[32] To be sure, such an exhaustive description of the world may be quite out of the cognitive grasp for the folk, and indeed may subsist without any folk whatsoever; Exhaustive SV seems to be directly contrary to Jackson’s mantra that ‘we are entitled to mean what we like by our words. But if we wish to address the concerns of our fellows when we discuss the matter…we had better mean what they mean.’[33]
Folk SV, in contrast, does not seem to be a priori true or necessary; the case of the capricious ethics deity who keeps moral amendments to himself should show as much. However, if Jackson intended SV to be born out of folk morality, does this at the outset put some sort of restraint on the ethical possibilities so as to exclude the capricious ethics deity example? I think not. Folk morality consists of the generally agreed upon moral convictions of people around the world, and in itself folk morality does nothing to exclude the metaphysical possibility of a capricious deity.[34] Even if there is a way to de facto exclude such cases, Folk SV risks being false for the same reason Jackson finds the global supervenience thesis for the psychological on the physical ‘non-controversially false’; it reads:
Psychological/Physical Supervenience (PPSV): ‘For all w and w*, if w and w* are exactly alike physically, then w and w* are exactly alike psychologically.’ [35]
It is arguable that a folk description of the world may not in fact be able to describe anything beyond the physical; furthermore, viewing the ethical as foundationally derivative from the psychological is a perfectly viable option with plenty enough advocates. As such, if the description only concerns the physical and if ethics is found to be based in psychology, then Folk SV can be false for the same reason PPSV is false.
Within his argument, I do not think Jackson gives SV a consistent reading; sometimes giving it an Exhaustive SV interpretation and other times giving it a Folk SV interpretation. For example, when he elucidates his co-extension argument he seems to give SV an Exhaustive SV reading; in contrast, Jackson’s desire to make folk morality ‘response-dependent’, his focus on language as foundational for our descriptions, and his openness to subjective ethics best lend themselves to a Folk SV reading of SV.[36] Given what I have said, I think two general strategies are open to Jackson: either find a way to collapse Exhaustive SV and Folk SV into one view or find some tertium quid as an additional pertinent reading of SV.
We have looked at Jackson’s solution to what he takes to be the location problem for ethics, and have established a dilemma concerning the truth of his key supervenience thesis based on the ambiguity of a word. My goal, I believe, has been met: to put an onus on Jackson to provide further justification for his theory, SV, for how ethical supervenes on the descriptive. Further justification and clarity is required for SV, if the rest of Jackson’s solution to the location problem is to run successfully.
References
Jackson, Frank. From Metaphysics to Ethics. Oxford, UK: Clarendon Press, 1999.
Jackson, Frank. ‘Précis of From Metaphysics to Ethics’. Philosophy and Phenomenological
Research. Vol. 62 (2001): 617-624.
Keefe, Rosanna. Review of From Metaphysics to Ethics, by Frank Jackson. Philosophical
Quarterly. Vol 49 (1999): 539-542.
‘Moral Cognitivism vs. Non-Cognitivism’. Stanford Encyclopedia of Philosophy. 2008. 2
May 2008 <http://plato.stanford.edu/entries/moral-cognitivism/#Cog>
Stich, Stephen and Weinberg, Jonathan M. Review of From Metaphysics to Ethics, by Frank
[1] Jackson (1999, p. 113). In this paper my scope will be limited almost exclusively to this chapter of Jackson’s book; I will not be interacting much with Jackson’s broader project concerning conceptual analysis.
[2] Jackson (1999, p. 119).
[3] Jackson (1999, p. 114).
[4] Jackson (1999, p. 114).
[5] Stanford Encyclopedia of Philosophy (2008, section 1.3)
[6] Jackson (1999, p. 113).
[7] Jackson (1999, p. 41).
[8] Jackson (1999, p. 113).
[9] Jackson (1999, p. 118).
[10] Jackson (1999, p. 118).
[11] Jackson (1999, p. 118-119).
[12] Jackson (1999, p. 119).
[13] Jackson (1999, p. 120-121).
[14] Jackson (1999, p. 121, 123); this is contra Jackson’s interpretation of G.E. Moore’s contention that goodness is a non-natural property.
[15] Jackson (1999, p. 122) and Keefe (1999, p. 541).
[16] Jackson (1999, p. 123).
[17]Jackson (1999, p. 123).
[18] Jackson (1999, p. 127).
[19] Jackson (1999, p. 127).
[20] Jackson (1999, p. 127).
[21] Jackson (1999, p. 124).
[22] Jackson (1999, p. 123-124)
[23] Jackson (1999, p. 128).
[24] Jackson (1999, p. 130-131).
[25] Jackson (1999, p. 130-131).
[26] Jackson (1999, p. 132).
[27] Jackson (1999, p. 137).
[28] This allowance of Jackson’s is puzzling in a couple different ways: First of all, if SV comes from folk morality and Jackson allows for multiple mature folk moralities, then there is perhaps an additional explanatory burden on Jackson to explain why SV is a necessary result of all folk moralities. Secondly, if the ethical properties are descriptive properties and if Jackson is open to ethical subjectivism, then doesn’t it seem like the different mature folk moralities would be referencing somewhat different descriptions?
[29] Thankfully, I found that many people share this concern; see Stephen Stich and Jonathan M Weinberg (2001, p. 640-641); also see Rosanna Keefe’s (1999, p. 541-542).
[30] Jackson (1999, p. 119)
[31] Jackson (2001, p. 619).
[32] Jackson (1999, p. 118-119).
[33] Jackson (1999, p.118).
[34] Jackson (1999, p. 132-135).
[35] Jackson (1999, p. 119).
[36] Jackson (1999, p. 120, 122-123, 132-135).
