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Proof (2021)

Until proven otherwise

 set themselves the goal of defining objects and applying adequate and predictive descriptive models to them. It is not certain, however, that all facts can be defined, observed and predicted in the same way. How are hypotheses corroborated in different fields of knowledge? What is reliability? When is it time to change the way we think? What are the differences between qualitative and quantitative approaches? This series of lectures will explore the question of evidence (or the lack of it) from the perspective of several disciplines.A series of public lectures organised as part of the teaching'"La recherche dans tous ses états"

  • Wednesdays from 3 November to 1 December 2021 from 5:15pm to 6:45pm
  • Amphimax building, room 412 and live webcast online on UNIL live Web Streaming https://www.youtube.com/channel/UCMRwzZJguCyzvveznZBrFgQ
  • Please note: Presentation of a covid certificate and identity document is compulsory for access to the conference room. Those unable to attend in person may follow the conference online, which will be broadcast live so that it can be accessed by anyone interested.

Organisation and registration: Delphine Preissmann (FBM, Sciences au Carré, delphine.preissmann@unil.ch)

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Programme

Date Speaker Title

3 November

Alain Papaux, Faculty of Law, Criminal Sciences and Public Administration

Beyond reasonable doubt: the law versus scientific evidence?

November 10: Please note: The conference is unfortunately cancelled for reasons beyond our control

Fabienne Fasseur, Faculty of Social and Political Sciences,

Did you say "all other things being equal?" Qualitative method and open systems

<17 November

Frédéric Schütz, Faculty of Biology and Medicine

Statistics, a science that doesn't need proving

November 24

Danielle Chaperon and Raphaël Baroni, Faculty of Arts

What is a robust model in literary theory?

1 December

Dominique Arlettaz, Faculty of Geosciences and Environment

Mathematical proof to push back the boundaries of the unknown

Conference summaries and videos

Alain Papaux, Faculty of Law, Criminal Sciences and Public Administration

Beyond reasonable doubt: the law versus scientific evidence?

« L’intime conviction » says the Court. « Beyond reasonable doubt » translates the’épistémologue. A matter for lawyers? When the examination of a chemical substance before it is placed on the market fails to establish that it is dangerous, can it be declared harmless? Ah, no  says the logician  the non-proof of A ¹ the proof of non-A. Will the authorisation be delivered ? The scientist and the lawyer reply that the Beyond reasonable doubt » is a presumption of innocence. The facts themselves are constructed on the basis of clues, let alone evidence. And clues always require interpretation, not simple deduction. Sherlock Holmes, a liar?

Fabienne Fasseur, Institute of Psychology, Faculty of Social and Political Sciences

You said «all other things being equal ?»

Qualitative method and open systems

Warning: Ms Fasseur's lecture has unfortunately been cancelled for reasons beyond our control

In the field of qualitative and critical health psychology, our approach focuses on exploring the subjective experience of individuals in contexts of health and illness. Understanding the behaviour of fundamentally different human beings calls into question the notion of scientific proof. In fact, the facts as experienced correspond to a complex form of reality experienced by individuals. In this context, the notion of scientific evidence becomes an important concept in other fields of science, which needs to be explored through its history and the ongoing debates between quantitative and qualitative methods. The field of qualitative methods is constantly evolving and is developing the means to replace the notion of proof with quality criteria that validate the scientific nature of its research practices.

Danielle Chaperon (French section) et Raphaël Baroni (French as a foreign language school), Faculty of Arts

What is a robust model in literary theory?

The narrative perspective is a complex phénomène that hasébeen théorisedé in various ways since the late nineteenthe siècle, up to the’à the’Gérard Genette's establishment, in 1972, of a modèle that has become standard and known in the field of narratology under the name of « triple focalisation ». This model, partly because of its « élégance », rapidly influenced teaching practices and, over the last fifty years, it continues to’êuit;e strongly mobilisedé for the interpretation of literary texts, not without posing someèmes problems, to which we shall return.

The inherent limitations of the Genettian conception of focus were first highlighted by the development of the Genettian theory of focus;volution de la théorie du récit dans le cadre’une narratologie filmique développe;e par François Jost (un doctorant de Genette). The stylistic approach has also highlighted the difficulties associated with the textual construction of point of view, which only imperfectly overlaps with the theory of triple focalisation. Finally, two trends emerge from the use of focalization in schools, which can be observed in teachers' discourse and in textbooks: the first is that of a gradual shift towards a conception of internal focalisation as an analysis of the subjectivity of the characters; the second is that of inherent difficulties; certain imprecisions of the modèle and à terminology employed by Genette, particularly with regard to the distinction between external focus and zéro focus.

To sum up, the conference will seek to show that intermedia comparison and the stylistic extension of narrative theory, as well as the study of its applications in schools, are ways of testing the robustness of narratological concepts and improving their usability.

Frédéric Schütz, Integrative Genomics Centre, Faculty of Biology and Medicine

Statistics, a science that doesn't need proving

Mathematical proof to push back the boundaries of the unknown

This presentation is set in the context of mathematics and aims to explain the difference between a conjecture, which is an assertion that we believe to be true without being able to be certain of it, and a theory, which is an assertion for which we have a proof that establishes its truth.

The main aim of mathematics is to define and explore the structures that define natural phenomena, and then to devise conjectures within this framework and, if possible, to prove them in order to transform them into theories. This transition from conjecture to theory can be long and tortuous, as was the case with Fermat's famous conjecture, which was unproven in 1637;The Fermat conjecture, first conjectured in 1637 and proved more than three centuries later by Andrew Wiles in 1995, was a case in point, but the discovery of a proof always leads to the creation of knowledge. Several examples will be presented, illustrating various methods of proof (direct proofs, proofs by rationale, proofs by absurdity, proofs by infinite descent, …).

While numerous theories have been proved over the centuries, it has to be said that there are still many mathematical conjectures today;Today, there are still many unsolved mathematical conjectures, some examples of which will also be discussed in the course of the lecture.