Olivier Massin

Although widely used across psychology, economics, and philosophy, the concept ofeffort is rarely ever defined. This article argues that the time is ripe to look for anexplicit general definition of effort, makes some proposals about how to arrive at thisdefinition, and suggests that a force-based approach is the most promising. Section 1presents an interdisciplinary overview of some chief research axes on effort, and arguesthat few, if any, general definitions have been proposed so far. Section 2 argues thatsuch a definition is now needed and proposes a basic methodology to arrive at it, whosefirst step is to make explicit the various tacit assumptions about effort made acrosssciences and ordinary thinking. Section 3 unearths 4 different conceptions of effortfrom research on effort so far:primitive-feelings accounts,comparator-based accounts,resource-based accountsandforce-based accounts. It is then argued that the first 2kinds of accounts, although interesting in their own right, are not strictly speaking abouteffort. Section 4 considers the 2 most promising general approaches to efforts: re-source-based and force-based accounts. It argues that these accounts are not only compatible but actually extensionally equivalent. This notwithstanding, it explains why force-based accounts should be regarded as more fundamental than resource-basedaccounts

Assumption: Sensory modalities are individuated by their proper objects. Hearing is the direct perception of sounds, sight the direct perception of colours, etc. Objection: There is no single type of proper sensibles in the case of touch (temperature, solidity, hardness, humidity, texture, weight, vibration...). Answer : 1. accept to distinguish the sense of pressure (touch strictly speaking) from the sense of temperature. 2. argue that pressures are the direct perceptual objects through which one perceives weight, texture, solidity.

The aim of this paper is to give a description of the objects of the sense of touch. Those objects, it is argued, are forces, rather than flesh deformation, solidity or weight. Tangible forces, basically tensions and pressures, are construed as symmetric and non-spatially reducible causal relations. Two consequences are drawn: first, the perception of heat and cold falls outside the sense of touch; second, muscular sense (together with a large part of proprioception) falls inside the sense of touch.

Le sens commun distingue le corps de l’esprit. Il considère par exemple que les désirs et les souvenirs sont des phénomènes mentaux alors que les sons et les courants d’air sont des phénomènes physiques. Au sein de l’esprit, il distingue diverses facultés mentales : il considère par exemple que l’imagination est distincte de la volonté, qui est elle-même distincte de la perception. Au sein de la faculté perceptive, il distingue cinq sens : l’odorat, le goût, la vue, le toucher et l’ouïe. Cette distinction entre différentes modalités perceptives s’avère tout à fait opératoire : nous n’avons le plus souvent aucun mal à répondre à la question « comment avez- vous perçu X : l’avez-vous vu, entendu, touché, ... ? ». En outre, cette distinction semble robuste : elle résiste par exemple à la co-occurrence d’expériences de modalités distinctes. Ainsi pouvons-nous voir et entendre un planeur à la fois. Enfin, nous semblons convaincus, en ce qui concerne les humains, du caractère exhaustif de cette distinction : il nous arrive certes de parler de l’intuition comme d’un sixième sens, ou de parler du sens de l’humour ou des affaires, mais ces expressions sont entendues en un sens figuré.

One common answer to the question of the unity of pleasures is to try to define pleasantness by appealing to a kind of mental states whose unity is less questionable. Desires have been conceived as the best candidates for this unifying role. Indeed, one way of classifying the preceding options concerning the definition of pleasantness, is to constrast conative (or motivational) theories of pleasure with non conative ones. Conative theories of pleasure are often considered as one homogeneous type of pleasure reductionism1. But there are indeed two importantly distinct way of defined pleasure with the help of desire: one can define pleasures as objects of desires (D7) or as satisfactions of desires (D8). For convenience, I shall call desirabilist the theory of the first kind (D7) and satisfactionist the theories of the second kind (D8). In the following, I shall argue that both these options fail. On the assumption that D7 and D8 are the only desired-based account of pleasure, this implies that pleasure can’t be reduced to desire.

Faced with the conflict between our intuition that no two things ever share a place at a time and these counterexamples to it, philosophers usually try to find a happy medium between sticking with the original intuition and rejecting all of its counterexamples or giving up the whole intuition and accepting all the counterexamples. Some counterexamples might be rejected on conceptual grounds : one may deny for instance that absolute space is in the same place that the entities located therein on the ground that absolute space is not itself located. One may also reject the distinct existence of some of the entities put forward in the examples : determinable properties might be nothing else than boolean combinations of determinate ones, spots on a screen may be just four dimensional worms whose passing through each other is a matter of part sharing rather than compenetration, etc. But as long as the conceivability of at least one counterexample is granted, the impenetrability intuition has to be weake- ned. To this end, one can weaken either the modal force of the impenetrability intuition or its scope. One may claim for instance that things are impenetrable in our world, but grant that the remaining counterexample refers to genuine metaphysical possibilities (although not natural ones). On the other hand, on may claim that the impenetrability intuition does not bear on every entity in the outside world, but only on some of them. Locke, famously, did not want to give up the metaphysical necessity of impenetrability, but agreed to restrict it to entities of the same kind.4 One other way to restrict the scope of the intuition of impenetrability is to claim that only independent entities (substances, or things proper) are impenetrable , or that only material entities are.

Sometimes we say that pleasure is distinct form joy, happiness, or good mood. Some other times we say the joy, happiness or good mood are types of pleasure. This suggests the existence of two concepts of pleasure: one specific, the other generic. According to the specific concept, pleasure is one type of positive affects among others. Pleasure is to be distinguished from joy, gladness, contentment, merriment, glee, ecstasy, euphoria, exhilaration, elation, jubilation; happiness, felicity, bliss, well-being; enjoyment, amusement, fun, rejoicing, delectation, enchantment, delight, rapture, relish, thrill; satisfaction, gratification, pride, triumph; good mood, jollity, gaiety, cheerfulness; relief (or at least from some of these concepts). According to the generic concept of pleasure, a pleasure is any of these positive affects. Joy, gladness, contentment, merriment, glee, ecstasy, euphoria, exhilaration, elation, jubilation, happiness, felicity, bliss, well-being, enjoyment, amusement, fun, rejoicing, delectation, enchantment, delight, rapture, relish, thrill, satisfaction, gratification, pride, triumph, good mood, jollity, gaiety, cheerfulness, relief and pleasure in the specific sense are all species of pleasures. In this thesis, I shall focus on the generic concept of pleasure, in order to address the question “what is the property of pleasantness common to all positive affects?” In order to address this question nevertheless, one need to have at least rough grip on pleasure in the specific sense and on what distinguishes it from other positive affects. I shall therefore start by hinting at the problem of the definition of the specific concept of pleasure.

Il est courant de diviser le champ d’investigation de l’éthique entre trois sous- domaines : la méta-éthique, l’éthique normative et l’éthique appliquée. L’éthique appliquée est le domaine le plus concret : on y traite par exemple des questions de savoir s’il faut autoriser l’avortement, l’euthanasie, la peine de mort... L’éthique normative traite de ces questions à un niveau plus abstrait : elle se demande ce qui fait qu’une action ou un type d’action est moralement bonne ou mauvaise. La relation entre l’éthique normative et l’éthique appliquée est un peu comme la relation entre la science pure, comme la physique, et l’ingénierie (Timmons : 17). Le domaine le plus abstrait de l’éthique est la méta-ethique : elle ne s’occupe par de la question de savoir ce qui fait qu’une action est bonne ou mauvaise (éthique normative) et encore moins de la question de savoir si le suicide est moralement bon ou mauvais. Elle s’intéresse à trois types de questions. Les premières sont métaphysiques : qu’est-ce qu’une valeur, qu’une norme (sont-ce des propriétés naturelles comme la masse, des propriétés non naturelles ? Des choses qui n’existent pas ?) ? Existe-t-il des valeurs objectives ? Les secondes sont épistémologiques : comment connaissons-nous les valeurs et les normes ? Par la raison ? L’intuition ? Les émotions ? Dans la mesure où la méta-éthique semble être le domaine le plus abstrait de l’éthique, la prudence pédagogique voudrait qu’on l’étudie en dernier : commencer par un cas concret, puis remonter petit à petit vers des questions plus abstraites. Pour des raisons qui vous apparaîtront j’espère au fur et à mesure, j’ai choisi de commencer néanmoins par des questions qui relève de la méta-éthique. Nous aborderons l’éthique normative et l’éthique appliquée dans la deuxième partie du cours.

Nous avons montré en première partie que la question du corps et de l’esprit posait trois problèmes distincts : le problème de la corrélation (comment expliquer la corrélation du corps et de l’esprit sans renoncer à leur différence de nature ?), le problème du corps propre (notre corps est-il un simple objet pour notre esprit ?), et le problème de la prévention de l’esprit à l’égard des corps (pourquoi considérons-nous plus volontiers que le monde se compose de corps que d’évènements ou de processus ?). Il ne faut donc pas réduire la question du corps et de l’esprit au seul problème de la corrélation. Cela dit, il faut maintenant souligner que le problème de la corrélation est de loin de plus important des trois, qu’il est en substance celui qui, des présocratiques à nos jours, a fait l’objet de l’attention philosophique la plus grande. La deuxième partie de ce cours lui sera donc consacrée.

Nous distinguons ordinairement le corps de l’esprit : nous parvenons aisément à concevoir (même si nous n’y croyons pas forcément) que notre esprit survive à notre corps, ou qu’il aille se loger dans un autre corps. Il y a là, pensons-nous, une véritable différence de nature. Mais bien que cette distinction nous soit très intuitive, dès lors que nous cherchons à spécifier le critère sur lequel elle repose, elle se dérobe. Tout se passe comme si nous n’avions aucun mal à classer les choses d’un côté ou de l’autre de la frontière qui sépare le corps de l’esprit, mais que nous ne parvenions pas à la définir précisément. A quel critère obéissons- nous en effet lorsque nous opérons une bipartition entre phénomènes mentaux et phénomènes physiques dans un ensemble tel que : une croyance, le téléphone du salon, un aimant, l’envie d’un florentin, le Mont Blanc, la vue du Mont Blanc, un claquement de porte, un regret, le bruit d’un moulin, la connaissance du théorème de Thalès, la jalousie, la couleur de la neige, le souvenir d’un citronnier à Menton ? Nous serions probablement tous d’accord pour ranger du côté des phénomènes physiques le téléphone du salon, le claquement de porte, la couleur de la neige, l’aimant, le Mont Blanc et le bruit du moulin ; et du côté des phénomènes mentaux la croyance, l’envie d’un florentin, le regret, la vue du Mont Blanc, la connaissance du théorème de Thalès, la jalousie et le souvenir d’un citronnier de Menton. Mais nous divergerions probablement si nous avions à formuler le critère d’après lequel nous avons opéré cette bipartition. La première chose à faire est donc de tenter d’examiner les critères qui peuvent nous permettre d’établir la distinction entre le corps et l’esprit afin de retenir le plus pertinent. Dans la mesure du possible, celui-ci devra être à la fois informatif (ne pas nous renvoyer simplement à la distinction intuitive que nous pratiquons quotidiennement) et neutre (par exemple être acceptable aussi bien par un dualiste que par un matérialiste). Une fois cette distinction établie, nous serons en mesure de poser trois problèmes.

La question que nous allons aborder dans ce cours est la suivante : peut-on réduire une société une simple agrégation d’individus, ou est-elle plus que cela ? Cette question introduit le débat qui oppose, en sciences sociales, les tenants de l’individualisme à ceux du holisme. En première approximation, les individualistes sociaux pensent qu’une société n’est rien de plus qu’une somme ou une agrégation d’individus. Les holistes sociaux pensent au contraire qu’une société n’est pas réductible à une simple agrégation d’individus. C’est là une question fondamentale aussi bien pour les sociologues que pour les philosophes. Mais en tant que futurs ingénieurs, vous vous dites peut-être que cela ne va pas vous empêcher de dormir. Pour vous convaincre qu’il y a là certaines raisons sinon de faire des nuits blanches, du moins d’avoir quelques discussions animées, nous allons rapprocher cette question, que l’on traitera dans la première partie du cours, de deux autres dont l’enjeu vous semblera certainement plus immédiat. Nous les traiterons respectivement dans les deuxième et troisième parties du cours.

Mixed feelings occur when a same subject experience both pleasure and displeasure at the same time. I argued that mixed feelings are not only possible, but that they constitute a widespread phenomenon. In the first part, I answer to three objections against the possibility of mixed feelings, the most important one being that mixed feelings contradict the view that pleasure and displeasure are contraries. In the second part, I argue that pleasure in effort, the pleasure we take in doing things, is a widespread phenomenon that constitutes a case of mixed feeling of a special sort: a case where the displeasure grounds or explains the pleasure. I argue that none of the usual strategies of the enemies of mixed feelings for dealing with putative cases of mixed feelings (oscillation between pleasure and displeasure, rejection of one of the two feelings) achieves to deal with pleasure in effort.

Nous défendons la thèse selon laquelle les images sont phénoménalement transparentes : nous ne voyons (quasiment) jamais leur surface mais seulement ce que les images dépeignent, ce qui implique que notre expérience des images est fondamentalement une illusion. Cette thèse s’oppose à celle de R. Wollheim, qui fait aujourd’hui figure de position standard, selon laquelle nous percevons la surface et le depictum. Une même expérience perceptive, selon nous, ne peut avoir deux objets ou deux aspects. En ce sens, nous sommes plus proche de la position de E.H. Gombrich : nous percevons soit la surface, soit le depictum, mais jamais les deux. Nous cherchons toutefois à la radicaliser en soutenant qu’il est finalement très rare de percevoir la surface de l’image.

This paper defends the view that Newtonian forces are real symmetrical and non-causal relations. In the first part, I argue that Newtonian forces are real; in the second part, that they are relations; in the third part, that they are symmetrical relations; in the fourth part, that they are not causal relations, (but causal relata) by which I mean that they are not species of causation. The overall picture is anti-humean to the extent that it defends the existence of forces, irreducible to spatio-temporal relations, but is still compatible with humean approaches to causation (and others) since it denies that forces are species of causation.

Our thesis is that proprioception is not a sixth sense distinct from the sense of touch, but a part of that tactile (or haptic) sense. The tactile sense is defined as the sense whose direct intentional objects are macroscopic mechanical properties. We first argue (against D. Armstrong, 1962; B. O'Shaughnessy 1989, 1995, 1998 and M. Martin, 1992, 1993,1995) that the two following claims are incompatible : (i) proprioception is a sense distinct from touch; (ii) touch is a bipolar modality, that intrinsically has both a subjective-bodily pole and objective pole. We then argue that the bipolarity of touch should be preferred over the introduction of a sui generis sense of the body. We try to revive Aristotle suggestion according to which the body is the tactile medium (like the air for sight). Since this medium is constantly changing its shape, we need some specific channel of information about its state : proprioception, functionally defined, is that part of touch which informs us about the state of this changing tactile medium. Though muscular and articular receptors are usually dedicated to inform us about the mechanical properties of the tactile media, and the skin receptors about the mechanical properties of the tactile objects, this is not essentially so. In weighting or wielding experiments we access the weight of external objects even when skin sensitivity is absent; in prosthetic touch, the skin receptors play the role usually assigned to muscle and articular receptors, namely to inform us about the mechanical state of the tactile medium. So proprioception, anatomically defined, can play both the role of informing us about the tactile medium, or about the tactile objects. That other sensory modalities also rely on proprioceptive information should be understood in terms of cross-modal dependencies: of sight, hearing, smell, taste...on touch.

This paper argues (i) that the possibility of experiencing at once pleasures and unpleasures does not threaten the contrariety of pleasure and unpleasure. (ii) That the hedonic balance calculated by adding all pleasures and displeasures of a subject at a time yields an abstract result that does not correspond to any new psychological reality. There are no resultant feelings. (iii) That there are nevertheless, in some cases, sentimental fusions: when the co-occurent pleasures and unpleasures do not have any bodily location, and that their intentional object vanishes, they truly fuse with each other, giving rise to sentimental mixtures in which the initial pleasures and unpleasures are no longer discernible.

This paper defends hedonic intentionalism, the view that all pleasures, including bodily pleasures, are directed towards objects distinct from themselves. Brentano is the leading proponent of this view. My goal here is to disentangle his significant proposals from the more disputable ones so as to arrive at a hopefully promising version of hedonic intentionalism. I mainly focus on bodily pleasures, which constitute the main troublemakers for hedonic intentionalism. Section 1 introduces the problem raised by bodily pleasures for hedonic intentionalism and some of the main reactions to it. Sections 2 and 3 rebut two main approaches equating bodily pleasures with non- intentional episodes. More precisely, section 2 argues that bodily pleasures cannot be purely non-intentional self-conscious feelings, by relying on Brentano’s objection to Hamilton’s theory of pleasure. Section 3 argues that bodily pleasures cannot be non-intentional sensory qualities by relying on Brentano’s objections to Stumpf’s theory of pleasure. Section 4 develops a brentanian view of the intentionality of bodily pleasures by claiming bodily pleasures are directed at a sui generis class of sensory qualities. Section 5 presents an objection to Brentano’s later theory of pleasure according to which all sensory pleasures are directed at sensing acts.

We review the history of the philosophy of fondue since Aristotle so as to arrive at the formulation of the paradox of Swiss fondue. Either the wine and the cheese cease to exist (Buridan), but then the fondue is not really a mixture of wine and cheese. Or the wine and the cheese continue to exist. If they do, then either they continue to exist in different places (the chemists), but then a fondue can never be perfectly homogenous (it is a French fondue). Or the wine and the cheese continue to exist in the same place (the Stoïcs), but then wine and cheese have to be, oddly, penetrable and spatially expansible. Aristote attempted to solve this paradox by arguing that the cheese and wine continue to exist, but only potentially in the fondue. We sketch an alternative answer. The wine and the cheese continue to exist, but only non-spatially in the fondue. Wine and cheese, once mixed, become non-spatial constituents of the fondue, a bit like character traits are non-spatial constituents of persons. The wine and the cheese are in the fondue, but only the fondue is there in the fondue pot.

The thesis defended is that at a certain arbitrary level of granularity, mountains have sharp, bona fide boundaries. In reply to arguments advanced by Varzi (2001), Smith & Mark (2001, 2003) I argue that the lower limit of a mountain is neither vague nor fiat. Relying on early works by Cayley (1859), Maxwell (1870) and Jordan (1872), this lower limit consists in the lines of watercourse which are defined as the lines of slope starting at passes. Such lines are metaphysically sharply delineated although they are not always easy to get at when facing a mountain. Hence, the indetermination is only epistemic. In the second part of the paper, I try to combine this claim about the lower limit of a mountain with more recent claims advanced by alpinists on the right way to measure the height of a mountain, so as to capture its topographic prominence. I argue following them that the proper height of a mountain is the difference of altitude between its summit and its key-saddle, defined as the highest saddle one needs to cross in order to reach the closest higher summit. Combining this two plausible views about the lower limit and height of a mountain leads to the surprising result that the key-saddle needed to measure the height of a mountain is not necessarily located on the lower-boundary of that mountain.

À l’origine de la philosophie comme des sciences, il y a, selon Aristote, « l’étonnement de ce que les choses sont ce qu’elles sont ». Nul doute qu’Aristote aurait trouvé en Suisse maints sujets d’étonnement. Qu’est-ce qu’une vache ? Qu’est-ce qu’une montagne ? Qu’est-ce que le Röstigraben ? Qu’est-ce qu’une fondue ? Qu’est-ce qu’un trou dans l’emmental ? Qu’est-ce que l’argent ? Qu’est-ce qu’une banque ? Qu’est-ce qu’une confédération ? Qu’est-ce qu’une horloge ? Qui est Roger Federer ? Qu’est-ce qu’est Anton Marty ? Qu’est-ce que le plaisir de manger du chocolat ? Chaque chapitre de cet ouvrage a été écrit par un spécialiste de renommée internationale et défend une solution claire à l’une de ces questions. Le tout constitue une introduction à la fois accessible et plaisante à un domaine de recherche philosophique aujourd’hui en effervescence : la métaphysique.