There are two ways to think about the relative fundamentality of two phenomena, which I introduced above. One is to think of the concept for one as having reference only if the concept for the other does. Brandom calls it reference-dependence,Footnote 4 saying that the “reference-dependence of one concept on another […] holds when the first cannot be true of something unless the second is true of something” (2015: 209).
A second way to think of relative fundamentality is of the grasp of one concept as depending on grasp of another. Thus, if one doesn’t grasp or understand the first concept, one doesn’t grasp or understand the other—the dependent. To grasp or understand a concept here means that one knows some of the conditions of its proper application and some of the consequences of its application. For instance, one doesn’t grasp the concept copper
Footnote 5 unless one knows, e.g., that a condition for predicating it of some object is that the object conducts electricity and that a consequence is that the object would melt if heated to 1084.7 °C. Brandom calls this sense-dependence: “One concept is sense-dependent on another if one cannot grasp or understand the first without grasping or understanding the second” (2015: 209).
For purposes of illustration of reference-dependence, consider the concepts parent and child. It cannot be true of something that it is a parent unless it is true of something that it is a child, and vice versa. These concepts are equifundamental in reference-dependence. Also, one cannot grasp the concept parent without grasping the concept child. So the concepts are equifundamental in sense-dependence. For, a proper condition of application of child is that it has a parent, and a proper condition for applying parent is that it has a child.
I want to spell out some of the possibilities with respect to fundamentality-relations between concepts that the distinction between sense-and reference-dependence implies. This is important for the promised tentative answer to the fundamentality-question in a later section.
As the concepts female and sister help illustrate, two concepts may be relatively sense- and relatively reference-dependent. One cannot grasp the concept sister unless one grasps the concept female, because the proper conditions of application of sister contains as a condition that female applies. That is, anyone who grasps the concept sister already grasps, in principle,Footnote 6 the concept female. So, female is more fundamental than sister in sense-dependence. Also, there may be females but no sisters, but if there are sisters there are females. So female is more fundamental than sister also in reference-dependence. Of these concepts, one (female) is more fundamental in both senses.
It is trickier with mixed dependence. Mixed dependence obtains when one concepts is more fundamental in either sense- or reference-dependence, but the other more fundamental in the other, or one is more fundamental in one way but they are equifundamental in the other. Consider, for instance, copper and electrical conducer. A world without copper may still contain electrical conducers, but a world without electrical conducers doesn’t contain copper. If so, copper is reference-dependent on electrical conducer. But is the same true for sense-dependence? If not, their relation is one of mixed dependence. And it seems that there may be a world of concept-users who grasp the concept copper but not the concept electrical conducer. As a matter of fact, that situation once obtained in our world. That is, concept-users may know some of the proper conditions for applying copper but not for applying electrical conducer. So it seems that copper isn’t sense-dependent on electrical conducer. One may grasp the former without grasping the latter. Still, might it be that copper is sense-dependent on electrical conducer “in principle” in the way sister is on female (see footnote 6)? That is, might it be that the conditions for properly applying copper are implicitly known in knowing the conditions for properly applying electrical conducer, such that in possessing the concept copper one already implicitly knows everything one needs to know to possess the concept electrical conducer, whether one knows that or not? The answer is arguably negative. Additional conditions beside being an electrical conducer obtain for proper application of copper, such as pertain to, e.g., density and melting point. These conditions aren’t implicitly known in knowing proper conditions for applying electrical conducer. Electrical conducers come in a variety of materials the corresponding concepts for which have a variety of different conditions of proper application. Therefore, possessing concepts for materials which are electrical conducers isn’t, not even in principle, to possess the concept electrical conducer. That is to illustrate a case of mixed dependence. I’ve now given examples to illustrate the possibility of the nine combinations of fundamentality. That was an exercise to prepare for applying the distinction to the fundamentality-question. For ease of reference, I repeat Fig. 1 here.
I emphasise again that the main point with this paper is exactly to elaborate the fundamentality-question, as above. Doing so reveals dimensions of it that has so far not been addresses, and a richness of alternative answers thereby made available. I turn next to attempt to make sense of what others have had to say about the fundamentality-relationship between individual intentionality and the individuality it implies, on the one hand, and collective intentionality and the collectivity it implies, on the other, in both the order of sense- and reference-dependence.
As it turns out, and should be expected, the interpretative task quickly runs afoul because the elaborated fundamentality-question hasn’t been raised before. What others have said will therefore appear mediocre (not in the derogatory sense, but in the sense of lacking at least half of an answer to the question). So, if one accepts the distinction between sense- and reference-dependence as I draw it here, then the problem we face in making sense of what philosophers have said about fundamentality, or of what they should say about it given their other commitments, is a problem due not to the question I’m recommending us to pose but due rather to a nine-dimensional blind spot in answers so far received. Hence, before continuing, I’m obliged to justify the application of the distinction between sense- and reference-dependence.
As an anonymous reviewer pointed out, the distinction between sense- and reference-dependence, for Brandom, mainly applies to empirical concepts, while I’m applying it to a theoretical concept; namely, intentionality. Let me clarify and then answer.
Theoretical concepts, for Brandom, are those that apply only inferentially (e.g., 2015: 59–61). Consider the concept muon (standing for a posited sub-atomic particle). If we cannot directly observe muons but can only apply muon by inference from observed circumstances (hooked vapor trails in cloud chambers observed by properly trained particle physicists etc.), then muon is a theoretical concept (ibid.: 115–16). Empirical concepts, by contrast, are those we can apply noninferentially (ibid.: 114–15). For instance, red is an empirical concept. You don’t have to infer the application of red from the visual presence of a red thing.Footnote 7 That is the difference between theoretical and empirical concepts. That difference mustn’t be confused with the difference between theoretical and empirical objects. For Brandom, following Sellars, a theoretical object is one whose existence is inferentially posited. Consider the planet Neptune. The planetary body was first posited as a consequence of the mathematics that explained the movements of other planetary bodies. Thus it was a theoretical object. A few years later, aided by calculations and increasingly sophisticated telescopes, Neptune was observed. Now, an empirical object is an object that is observed. Neptune, then, was an empirical object; first it was inferentially posited (theoretical object) and then it was observed (empirical object). This isn’t a change of the object, in this case Neptune, but a change in how we’re acquainted with it (an epistemological and not metaphysical change) (Brandom, 2002: 362).Footnote 8
Now, then, the worry at hand is that intentionality is a theoretical concept and that the application of the distinction between sense- and reference-dependence is problematic in the context of theoretical concepts. But this worry is unwarranted. Thus, consider again the theoretical concept muon. We may ask, to begin with, what else would have to be true of a world for it to be true that it contains muons. That is to ask whether, and possibly on what, the theoretical concept muon is reference-dependent. It is an intelligible question. Also, answers to it make much sense: muon is reference-dependent on, e.g., mass and electric charge. We may also ask what other concepts anyone would have to master to master muon. This is to ask whether, and possibly on what other concepts, the theoretical concept muon is sense-dependent. It seems straightforward to search for an answer; e.g., one must grasp elementary particle, decay, and so on, to grasp muon. Hence, questions and answers about both the sense- and reference-dependence of theoretical concepts, of which muon is an example, can be shown to be unproblematic.
Recall that the worry that I want to answer here is that the application of the distinction between sense- and reference-dependence, as I apply it, is problematic because intentionality is a theoretical concept. But I’ve now shown an example of nonproblematic application of the distinction between sense- and reference-dependence to theoretical concepts. I’ll not go on to consider more cases, but assume the project worthy of pursuit.Footnote 9
We may now return to the interpretative task to find what others have said about fundamentality in light of the elaborated fundamentality-question. I said that this task is problematic because others haven’t considered that question before. Having now argued that the problem isn’t due to how I apply the distinction between sense- and reference-dependence in posing the question, I take it that the following shows why it is problematic to not apply that distinction in addressing the fundamentality-relations between the individuality and individual intentionality, on the one hand, and collectivity and collective intentionality, on the other. I will only consider two (rather different) cases: Searle, and Zahavi (and Zahavi and Kriegel).
Searle argues that collective intentionality is a sui generis form of intentionality, caused and realized in individual brains of members of sufficiently evolved species (1995: 24–25; 2006). This recommends interpreting him as claiming equifundamentality in reference-dependence. That is, if brains of members of those species cause individual intentionality, they cause collective intentionality, and vice versa (equifundamentality in reference-dependence). On the other hand, his position is perfectly compatible with there being worlds with no species having evolved collective intentionality but with some species having individual intentionality. So, if the reference-class is possible worlds rather than known species in our world, collective intentionality and individual intentionality aren’t equifundamental in reference-dependence. In fact, also if the reference-class is our world, Searle’s position is compatible with there being individual intentionality but no collective intentionality if he takes non-human organisms to have individual intentionality. Hence, it might still be that, for Searle, collective intentionality is reference-dependent on individual intentionality; i.e., in some, perhaps many, world(s) it is true of something that it has individual intentionality but not true that something has collective intentionality. But then again, his statement that no set of individual intentionality, in the form ‘I intend’, even supplemented with mutual belief, adds up to collective intentionality, in the form ‘we intend’ (1995: 24)Footnote 10 suggests the opposite interpretations. To correctly interpret Searle’s position in the realm of reference-dependence we need to know if it is compatible with the possibility of collective intentionality referring without individual intentionality referring.
Concerning sense-dependence it isn’t much clearer. Searle’s claim that in order to engage in collective agency, which involves collective intentionality, one need only to have a “Background sense of the other as a candidate in cooperative agency” (1990: 415) is suggestive. One needn’t, plausibly, have the concept collective intentionality to have collective intentionality; if there are (or are no) concept-users there can be collective intentionality without concept-users having the concept collective intentionality. The question then is if one must have the concept individual intentionality to have the concept collective intentionality, and/or vice versa, or if they are equifundamental in sense-dependence. That is, can anyone understand what collective intentionality is without understanding what individual intentionality is, and/or vice versa?
Since what Searle says isn’t a response to the elaborated fundamentality-question, no clear answer is to be expected. In fact, faced with this new question, Searle might give entirely different answers than the ones I’ve attributed to him. I’ll return to this later.
Zahavi and Kriegel are straightforward and explicit on reference-dependence, in the context of individual and collectively shared experience. They say that the first-person “me-ness-manner” of experiencing is a “pervasive” “constitutive” “feature of experiential life as such,” (2016: 38). It is “the most fundamental fact … most general, most elemental dimension about phenomenal consciousness” (ibid.: 50).Footnote 11 So, it would seem, there can be individual experiencing (and, I add, intentionality) without collective.
With respect to sense-dependence, matters are less clear. Granting both that there can be me-ness-manner experiencing without concept-users and that there can be me-mess-manner experiencing without us-ness-manner experiencing, we can still ask: could there be concept-users grasping the individuality implicit in for-me-ness experiencing that according to Zahavi and Kriegel is the most fundamental fact of phenomenal consciousness and which is expressed by the concept for-me-ness, or colloquially in ‘I feel …’, while those concept-users don’t grasp the collectivity implicit in shared for-us-ness experiencing, expressed by the concept for-us-ness, or colloquially ‘we feel…’? This is the question, not if there can be for-me-ness experiencing without for-us-ness experiencing, but if anyone could grasp and express what subjectivity is implicit in one of these modes of experiencing without also grasping and being able to express what subjectivity the other mode implicitly involves. Clearly, that isn’t Zahavi’s, or Zahavi and Kriegel’s, question, concerned, as they are, with phenomenal consciousness. But it is a question worth asking to properly appreciate the many facets that the fundamentality-question shelters, and to learn to navigate the kaleidoscope of answers that rotating them produces.
It is clear in much of the literature that reference-dependence is the main preoccupation; with whether collective and collective intentionality has reference only if individual and individual intentionality. The issue of sense-dependence has by and large passed unnoticed. I end this section with a note on why this neglect is important, using an analogy to how and why Brandom puts the distinction between sense- and reference-dependence to use. But first, I want to address those for whom all this talk of sense- and reference-dependence might be positively intriguing but ultimately an evasion of the real issue: supervenience.Footnote 12
Let us help ourselves to a standard and admittedly somewhat generic articulation of supervenience: properties of some type C´ supervene on some other type of properties C if it isn’t possible that two worlds are identical with respect to their C-type properties but not their C´-type properties; that is, the C-properties in a world determine its C´-properties. This is called global supervenience (e.g., Chalmers 1996: 34). In the present context, orthodoxy has it that collective intentionality supervenes on individual psychological states: if facts about psychological states of individuals in world w were different, so would facts about collective intentionality in w; or, if individuals in w didn’t have certain psychological states, w would lack collective intentionality. While these claims have an intuitive appeal, they aren’t uncontroversial (e.g., Epstein 2015). For purposes of this paper, I won’t dispute that collectivity and collective intentionality supervene on individuality and individual psychological states.Footnote 13
Still, someone could object that the sense of fundamentality that the concept of supervenience articulates is more fundamental than those articulated by sense- and reference-dependence, respectively or together. This is a critique directed against the relevance of working with the latter two. I cannot devote much space to a detailed argument whether supervenience is a more fundamental fundamentality-relation than are sense- and reference-dependence, let alone give a satisfyingly exhaustive analysis of how it relates to the latter two.Footnote 14 Nevertheless, note that supervenience and reference-dependence aren’t worlds apart. After all, while reference-dependence, on the one hand, articulates a relation of fundamentality between concepts C and C´ such that “C´ is reference-dependence on C” means that unless C is true of something in world w, C´ isn’t true of something in w, supervenience, on the other, articulates a relation of fundamentality between properties, say C-type and C´-type properties, such that “C´ supervenes on C” means that there are no two possible worlds w and w´ identical with respect C-properties but differing with respect to C´-properties. But, now, if concept C´ (say, child) is reference-dependence on concept C (say, parent) then it is also true that there would be no C´-property (property picked out by C´; say, child of) in w if there were no C-property (property picked out by C; say, parent of) in w. What reference-dependence doesn’t imply, while supervenience does imply it, is that C-facts determine C´-facts (locally or globally). What reference-dependence implies, rather, is that whether C refers in w determines (I prefer “settles the question”) whether C´ can refer in w; or, in other words, the fact whether C refers in w determines (settles) the fact whether C´ can refer in w. We could perhaps say that supervenience helps in explaining why worlds differ or are identical with respect to certain properties and facts. Reference-dependence instead helps to determine what judgements about properties and facts can be true in a world depending on what others are.
What I’ve said doesn’t answer a critic who objects that supervenience is a more fundamental fundamentality-relation than sense- and reference-dependence. Instead I’ve considered similarities and differences between supervenience and reference-dependence. Sense-dependence, I hope I’ve made clear, is a different beast. Which naturally leads to the closing of this section.
I said I’ll close this section by clarifying why sense-dependence is important, using an analogy. Here it is: Brandom introduces the distinction between sense- and reference-dependence to defend the dual and according to him complementary theses of modal realism and modal expressivism (2015, Chapter 5; 2019, Chapter 7). Roughly, he argues that true modal claims state facts (modal realism), and that what one is doing in making modal claims is making explicit inferential relations implicit in making ordinary empirical descriptive claims such that the latter track modal facts (modal expressivism). The ultimate aim is to be entitled to say that the classical empiricist Humean, or more updated Quinean, position, in which one purports to understand perfectly well statements to the effect that things are thus-and-so but not having a clue on what grounds statements are warranted that they could or must be some way, are mistaken (Brandom, 2015: 179, 213). To that end, the argument is that expressions as to how things are (not) are sense-dependent on expressions as to how things could (not) be. That is, one cannot grasp ordinary empirical descriptive expressions, e.g., “The cat is on the mat,” unless one grasps their modal involvements, e.g., that it could still be true if the cat and the mat were moved slightly to the right or if a bumblebee in the garden were about to pollinate a daffodil but wouldn’t be true if the mat burst into flames or the cat ran off to chase a mouse. This would mean that one must already be able implicitly to grasp modal claims to grasp ordinary descriptive claims.
The analogue I want to make is that adding sense-dependence as a dimension of concern along common concerns with reference-dependence is important because in so doing we may ask whether, assuming we grasp individual intentionality and what it is for an ‘I’ or ‘me’ to have intentionality, we must already grasp collective intentionality and what it is for a ‘we’ or ‘us’ to have intentionality, and/or vice versa.
Thus, imagine the claim, on analogy to the Humean’s about laws and necessities, that one can understand perfectly well what individuality and individual intentionality is but not what collectivity and collective intentionality is. Can we answer, analogously to Brandom’s response to the Humean, that in knowing the former one already knows everything one needs to know to know the latter? Continuing the analogy (perhaps stretching it too far), can we have the combined and complementary theses that, first, claims about collectivity and collective intentionality state facts that don’t reduce to facts about individuality and individual intentionality (realism about collectivity and collective intentionality) and that those claims make explicit capacities implicit in making claims about individuality and individual intentionality (expressivism about collectivity and collective intentionality)? Equipped with the distinction between sense- and reference-dependence, the project to assess whether we can be to Searle, and others (or indeed to the major part of the received wisdom on the fundamentality-question), what Brandom purports to be to Hume and Quine, and others, can start. What follows in the next section is a first attempted ant step on that path.
And let me add another case in which the question of sense-dependence is interesting to raise. Earlier we considered a critic asking if not supervenience articulates a more fundamental sense of fundamentality than do sense- and reference-dependence. I admitted that I couldn’t (at least here) give a straightforward answer. But now consider this counter: Are you asking if not supervenience gives a more fundamental sense of fundamentality than either sense-dependence or reference-dependence, or both, in either sense-dependence or reference-dependence, or both, or a more fundamental sense than one in one sense but equifundamental to the other in the other sense? Perhaps it is intelligible to ask (but, at the face of it, not to me) whether supervenience refers to something only if either or both reference-dependence or sense-dependence refers to something, or the reverse, or if they’re equifundamental in reference-dependence. One could also ask whether one has to grasp supervenience in order to grasp either or both reference-dependence or sense-dependence, or the reverse, or if they’re equifundamental in sense-dependence. But I must admit that for theoretical concept of this calibre I stand dumbfound at the question; the question, namely, if not supervenience is more fundamental.Footnote 15
I said that the elaboration of the fundamentality-question was my first and main concern. So the paper might’ve ended here. But I want to venture one more tempting and natural idea; namely, a tentative answer.