Luca Sciortino

In this chapter I shall address the question as to whether there exists a universal and atemporal justification for the claims made by a community that adopts a particular style of reasoning. I shall present a case study in which a claim made in the laboratory style of reasoning has no universal and atemporal justification. As I shall explain, Hacking justifies his belief that unobservable entities exist on the ground that they can be regularly manipulated by experimenters in order to find out and produce various phenomena (experimental realism); he also maintains that no belief that our theories are true is required in order to be realist about unobservable entities. I shall argue that his justification is relative to the laboratory style of reasoning. Ultimately, from this case study I shall draw the important conclusion that the styles of reasoning project implies epistemic relativism. In the first part of this chapter, I shall analyse Hacking’s experimental realism in the light of the styles of reasoning project. I shall start by making these points: Hacking’s theory anti-realism denies the possibility of ranking styles of reasoning in terms of their capacity to explain phenomena; furthermore, Hacking is not successful in showing that his entity realism is justified for a community that does not adopt the laboratory style of reasoning. It will follow that the styles of reasoning project is in conflict with the claim that we know about unobservable entities.

My book 'History of Rationalities: Ways of Thinking from Vico to Hacking and Beyond' draws a number of philosophical implications from Hacking's characterization of the notion of style and analyzes them. How did certain concepts emerge and change? How have our styles of reasoning changed and why? To what extent is the emergence of the styles of reasoning at a certain point of history a contingent circumstance? Why have these styles of reasoning endured? In this article I explain how I have attempted to answer these questions in my book.

In this contribution I will retrace the main stages of my research on the objectification problem in quantum mechanics by highlighting some personal memories of my supervisor, the theoretical physicist Giovanni Morchio. The central aim of my MSc thesis was to ask whether the hypothesis of objectification, which is currently added to the formalism, is not, at least in one case, deducible from it and in particular from the dynamics of the temporal evolution. The case study we were looking for had to: 1) represent a situation similar to that in which a macroscopic system such as a measurement apparatus, following interaction with a system, assumes a well-defined state (which or for example represents the fact that the result of a measurement is a particular value), i.e becomes objective 2) represent a fact in nature in which it is not clear whether its explanation can be derived from the formalism of quantum mechanics or whether a hypothesis of objectification is necessary for its explanation. Proving that such a fact can be deduced from the time evolution of quantum mechanics allowed us to conclude that there are cases in which the hypothesis of objectification is superfluous or, in other words, obtainable from the formalism.

In this paper I propose a solution to the crucial issue of the number of styles of reasoning. Ever since, in the 1980s, Ian Hacking outlined what he later called the ‘project of styles of scientific reasoning’, for short the ‘styles project’, he has never provided criteria for individuating styles of reasoning. Whether or not certain ways of thinking can be counted as styles of reasoning in the sense of Hacking is a question that has remained unanswered, despite its apparent relevance to various other controversial issues related to the styles project. I shall frame the issue within a view of categorization which begins with the later philosophy of Wittgenstein and culminates with the so-called theory of prototypes in psychological research. My conclusion will be that there is no clear boundary to the category of styles of reasoning and that degrees of category membership for a given way of thinking are determined by its degree of similarity to prototypes such as the statistical style of reasoning.

In this chapter I shall present two different notions of the concept of ‘ways of thinking’ named ‘style of reasoning’ and ‘epistemic virtue’, which have been proposed, respectively, by Ian Hacking and by Peter Galison and Lorraine Daston. To explain how the former characterizes the notion of style of reasoning, I shall reread his book The Emergence of Probability in terms of the notion of ‘statistical style of reasoning’ and Shapin and Schaffer’s Leviathan and the Air Pump in terms of the notion of ‘laboratory style of reasoning’. My analysis will show that many points of Hacking’s styles project need to be developed in order to make his suggestions into a full-fledged theory. A salient point of my analysis will be that Hacking’s is another of the projects of historical epistemology that historicize Kant. I shall also show that there are substantial convergences between the styles project and Daston and Galison’s study on objectivity. Finally, following Williams’s account of truth and truthfulness, I shall argue that styles of reasoning are ways of telling the truth and ways of looking at the world.

In this chapter I shall bring to the fore the family resemblances of the different notions of the concept of ‘ways of thinking’ that I have introduced in the previous chapter. For example, I shall compare Hacking’s styles project with Daston and Galison’s study on objectivity as well as with other projects such as Fleck’s, Kuhn’s and Foucault’s. Thanks to these comparative analyses, I shall identify points where all these projects support one another. I shall also provide a model for studying objectivity that incorporates the notions of Fleck, Foucault, Kuhn and Hacking. Used together, these notions provide a more profound understanding of how objectivity emerges. Furthermore, I shall propose a layered diagram that maps the differences between the notions of thought style, episteme, paradigm and style of reasoning. Finally I shall highlight two philosophical issues, relativism and contingency, connected with the concept of ‘ways of thinking’ in all its different notions. I shall argue that this issue is particularly controversial in the case of Hacking’s notion.

In this chapter, I shall consider a number of connections between various ideas of the theory of styles of reasoning and the issue of the contingency and inevitability of science. By ‘contingency issue’ it is meant the question as to whether the history of a particular branch of our science could have taken a different route and provided results incompatible with those of our actual science. Apart from Hacking’s recent comments, the discussions on the contingency issue have not involved the notion of style of reasoning. I will fill this gap in the literature by drawing some important implications for the issue of contingency from the theory of styles of reasoning that I have developed so far. I shall address four fundamental questions. First of all, in the next section I shall discuss to which extent the emergence of styles of reasoning at a certain point of history is a contingent circumstance. In the following section I shall ask whether the endurance of styles of reasoning was inevitable by tackling the connected question as to why the styles are long lasting. Afterwards, I shall focus on the growth of knowledge by dealing with questions such as: if a certain style of reasoning continues to be employed and if Q is a ‘live question’, is science bound to converge on a single answer to Q? Finally, on the basis of my previous reflections I shall look into the question of the convergence of science in the long run. The answers to these questions will rely on some basic assumptions of the theory of style of reasoning and imply a picture of the evolution of sciences in which both contingency and inevitability play a key role.

This chapter expounds Hacking’s project of styles of reasoning more systematically than Hacking himself has done, while the following chapters examine its philosophical implications. I shall show that, in addition to the statistical and the laboratory style described in Chap. 3, there exist other four styles of reasoning that share a set of common characterizing features: the algorithmic, the postulational, the historico-genetic and the taxonomic style of reasoning. All the differences notwithstanding, striking parallels can be drawn between these different styles of reasoning: they emerged suddenly at certain points in time, crystallized around communities that shared certain standards of evidence and represent basic and inescapable forms of reasoning. Finally, I shall argue that there are other ways of thinking that differ from styles of reasoning in the sense of Hacking. What I consider a relevant difference is that only styles of reasoning have strong techniques of self-authentication, techniques that are intrinsic to their forms of reasoning.

The idea that in human history it is possible to recognize distinct ways of thinking is widespread in the literature. Sometimes, instead of the phrase ‘ways of thinking’, other labels are used, such as ‘forms of thought’, ‘modes of thinking’, ‘ways of knowing’, ‘ways of reasoning’, ‘mental attitudes’ or ‘worldviews’. At any rate, it is possible to say that there is a concept, that of ‘ways of thinking’, which has played a crucial role in philosophy at least since the Enlightenment and has acquired considerable weight with the emergence of a French tradition in philosophy of science called historical epistemology. This concept appears in different versions, as if they were species of the same genus. In this chapter, I shall outline its history, from Vico to Hacking and beyond, and I shall show how and why its different species have been introduced. My account provides a guiding thread running through philosophy of science that unifies the researches of important authors such as Lévy-Bruhl, Brunschvicg, Metzger, Koyré, Fleck, Foucault, Kuhn, Hacking and others. This guiding thread is mainly constituted by the project of historicizing Kant’s a priori by replacing it with a given notion of ‘ways of thinking’.

In the last decade, awareness has grown that global warming, overpopulation and the destruction of natural habitats are destroying biodiversity. The consequences of this phenomenon have also been extensively discussed in the literature, from vulnerability to natural disasters to the availability and quality of food and water resources. Less attention has been paid to another phenomenon of no less shocking significance for our lives: the loss of cultural diversity which is affecting the human sphere, including the ways of living and thinking, the languages and visions of the world, the knowledge and the traditions. This essay documents this phenomenon and considers its negative effects on the preservation of the heritage of traditions and on the expansion of opportunities for innovation. ABSTRACT (ITA) Nell’ultimo decennio è cresciuta la consapevolezza che il riscaldamento globale, la sovrappopolazione e la distruzione degli habitat naturali stanno distruggendo la biodiversità. Sono state anche ampiamente discusse in letteratura le conseguenze di questo fenomeno, dalla vulnerabilità ai disastri naturali, sino alla disponibilità e alla qualità delle risorse alimentari e idriche. Minore attenzione è stata riservata a un altro fenomeno di portata non meno sconvolgente per le nostre vite: la perdita di diversità culturale che riguarda la sfera umana, comprendendo i modi di vivere e di pensare, i linguaggi e le visioni del mondo, ma anche le conoscenze e le tradizioni, nonché le specificità locali. In questo articolo si documenta questo fenomeno e se ne indicano i riflessi negativi sulla conservazione del patrimonio delle tradizioni e sull’ampiamento delle opportunità di innovazione.

ABSTRACT (ENG) One of the concerns of Greek philosophy centred on the question of how a manifold and ordered universe arose out of the primitive state of things. From the mythical accounts dating around the seventh century B.C. to the cosmologies of the Classical period in Ancient Greece, many theories have been proposed in order to answer to this question. How these theories differ in positing a “something” that pre-existed the ordered cosmos has been widely discussed. However, scholars have rarely made explicit how they differ in style of thought. In the span of four centuries the first deductive arguments of the Eleatic philosophers culminated in the emergence of logical proof and a form of explanation of natural phenomena, which consisted of searching for the simplest and fewest premises and deducting implications. In this paper it will be discussed how, at distinct stages of its development, the deductive thinking informed the solutions proposed to solve the chaos-order problem, that of how an ordered universe has been possible. ABSTRACT (ITA) Una delle più importanti questioni della filosofia greca è stata quella di comprendere come sia stato possibile un universo ordinato a partire da uno stato primordiale. Dalle teogonie del VII secolo a.C. fino alle cosmologie dei filosofi dell’età classica, sono state proposte diverse teorie per dare risposta a questa domanda. Come esse differiscano nel postulare l’esistenza di un “qualcosa” di primordiale che preesisteva all’ordine del cosmo è stato molto discusso. Pochi studiosi, però, le hanno esaminate sullo sfondo della lenta evoluzione del pensiero deduttivo, culminata nella dimostrazione in geometria e in una forma di spiegazione dei fenomeni che consisteva nel cercare semplici premesse e inferire conclusioni. In questo articolo si mostrerà come il lento affermarsi della spiegazione razionale prima, dell’argomento deduttivo e della dimostrazione in geometria poi, abbiano dato forma alle diverse risposte al problema caos-ordine, e in particolare alla domanda su come sia sorto un universo ordinato.

In questo saggio argomento che esistono due modi di pensare i luoghi: l’uno accetta l’idea che alcuni di essi abbiano una dimensione trascendente, che per semplificare potremmo chiamare il Genius loci, ovvero il loro spirito, la loro anima; l’altro tende a svuotarli di significati che vanno al di là dell’esperienza sensibile. Chiamerò “religioso” e “profano” questi due modi di pensare: come si caratterizzano? E come definiscono l’idea di luogo? Soprattutto, quali sono le conseguenze dell’adozione dell’uno o dell’altro modo di pensare? Queste sono le domande che mi pongo in questo saggio.

ABSTRACT (ENG) The recent evolution of the most advanced societies is characterized by the increasing use of hypertext. The latter is an electronic text with hyperlinks to other text that a user can immediately access. The World Wide Web itself is a sort of global hypertext that can be viewed as a network of nodes, represented by individual elements connected through the so-called links. In this paper, I ask myself in what sense reading with new technologies is a different cognitive experience from reading a printed text. In the first part, I examine the conditions that made the emergence of hypertext possible by examining some mutations in human thought. In the second part, I argue that the emergence of hypertext has not only made the reading experience different but has also reshaped the figure of the reader. ABSTRACT (ITA) L’evoluzione recente delle società più avanzate è caratterizzata dall’uso crescente dell’ipertesto. Quest’ultimo è un testo elettronico con riferimenti ad altri documenti, accessibili cliccando su parole chiave. Lo stesso World Wide Web una sorta di ipertesto globale che si può immaginare come una rete di nodi, rappresentati da singoli elementi connessi attraverso i cosiddetti link. In questo articolo ci chiediamo in che senso leggere con le nuove tecnologie sia un’esperienza cognitiva differente rispetto a quella di leggere un testo stampato. Nella prima parte esaminiamo le condizioni che hanno reso possibile l’emergere dell’ipertesto considerando alcune mutazioni in seno al pensiero umano. Nella seconda parte argomentiamo che con l’ipertesto è nata una nuova forma di lettura che ha a sua volta costituito una nuova figura di lettore.

The analytical notions of ‘thought style’, ‘paradigm’, ‘episteme’ and ‘style of reasoning’ are some of the most popular frameworks in the history and philosophy of science. Although their proponents, Ludwik Fleck, Thomas Kuhn, Michel Foucault, and Ian Hacking, are all part of the same philosophical tradition that closely connects history and philosophy, the extent to which they share similar assumptions and objectives is still under debate. In the first part of the paper, I shall argue that, despite the fact that these four thinkers disagree on certain assumptions, their frameworks have the same explanatory goal – to understand how objectivity is possible. I shall present this goal as a necessary element of a common project -- that of historicising Kant's a priori. In the second part of the paper, I shall make an instrumental use of the insights of these four thinkers to form a new model for studying objectivity. I shall also propose a layered diagram that allows the differences between the frameworks to be mapped, while acknowledging their similarities. This diagram will show that the frameworks of style of reasoning and episteme illuminate conditions of possibility that lie at a deeper level than those considered by thought styles and paradigm

The analytical notion of ‘scientific style of reasoning’, introduced by Ian Hacking in the middle of the 1980s, has become widespread in the literature of the history and philosophy of science. However, scholars have rarely made explicit the philosophical assumptions and the research objectives underlying the notion of style: what are its philosophical roots? How does the notion of style fit into the area of research of historical epistemology? What does a comparison between Hacking’s project on styles of thinking and other similar projects suggest? My aim in this paper is to answer these questions. Hacking has denied that his project of styles of thinking falls into the field of historical epistemology. I shall challenge his remark by tracing out the connections of the notion of style with historical epistemology and, more in general, with a tradition of thought born in France in the beginning of twentieth-century.

In different versions, from Heraclitus to Plato and from Plotinus to the Romantic poets, many thinkers have put forward the idea that the universe has a soul, the so called anima mundi. If the soul of a human being can be thought as the totality of the traits which form character and personality, that of the universe too can be imagined as a complex of distinct traits and dispositions which can be recognised in the phenomenal world. Then, we may ask ourselves:are there events which suggest the idea of the existence of the soul of the world? In what sense do they differ from other events which drift away into nothing? How do they move us? Can they be captured by a photography? I reflect on these questions intertwining philosophy, travel tales, poetry and photography studies. Molti filosofi hanno sostenuto che l’universo ha un’anima, la cosiddetta anima mundi. Di questa idea sono state proposte diverse versioni a partire dalle cosmologie orientali e dal pensiero di Eraclito e Platone. Se l’anima di un essere umano puo' essere pensata come la totalita' dei tratti che formano la sua personalita', allora anche quella dell’universo puo' essere immaginata come un complesso di tratti distintivi e disposizioni rintracciabili nel mondo dei fenomeni. Ci possiamo allora chiedere: quali sono gli eventi che suggeriscono l’esistenza dell’anima del mondo o rivelano alcuni dei suoi tratti? In che senso differiscono da altri eventi che si perdono nel flusso indistinto e ininterrotto del tempo? Come ci emozionano? Possono essere catturati da una fotografia? Sciortino riflette su queste domande intrecciando filosofia, racconto di viaggio, poesia e critica della fotografia. Ne emerge un avvincente racconto, corredato da bellissime fotografie, di come la bellezza raggiunge i nostri cuori, muove la nostra immaginazione e ci rivela l’essenza delle cose

The question as to whether Ian Hacking’s project of scientific styles of thinking entails epistemic relativism has received considerable attention. However, scholars have never discussed it vis-à-vis Wittgenstein. This is unfortunate: not only is Wittgenstein the philosopher who, together with Foucault, has influenced Hacking the most, but he has also faced the same accusation of ‘relativism’. I shall explore the conceptual similarities and differences between Hacking’s notion of style of thinking and Wittgenstein’s conception of form of life. It is a fact that whether or not the latter entails epistemic relativism is still a controversial question. From my comparative analysis, it will emerge that there are stronger reasons to conclude that Hacking’s notion of style leads to epistemic relativism than there are to reach the same conclusion in the case of Wittgenstein’s conception of form of life. This point will be at odds with the anti-relativistic stance that Hacking has taken in his more recent writings.