Tournesol Association

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Tournesol is a project led by the Tournesol Association, created in Vaud, Switzerland.


Lê Nguyên Hoang, President of the Tournesol Association.

The current Board was elected at the Constitutive Assembly, on April 20, 2021, for a period of two years.

Aidan Jungo, Secretary of the Tournesol Association.

The President of the Tournesol Association is Dr. Lê Nguyên Hoang. He is a computer science researcher and a science communicator at EPFL. He is also a Member of the Data and AI Ethics Council at Orange. Previously, he obtained a engineering degree from the École Polytechnique in Paris and a PhD from Polytechnique Montreal, before joining MIT as a postdoctoral research. He also runs the YouTube channel Science4All, with 200k+ subscribers. He authored the books The Equation of Knowledge, Le Fabuleux Chantier (with Professor El Mahdi El Mhamdi) and Turing à la plage (with Professor Rachid Guerraoui). More recently, he co-founded Tournesol.

The Secretary of the Tournesol Association is Aidan Jungo. He is a research scientist in the field of aircraft design. He participates in different EU projects, including AGILE 4.0. He obtained his Bachelor degree in mechanical engineering from University of Applied Sciences of Geneva (HEPIA) and his Master degree in mechanical engineering from EPFL with specializations in energy and fluid dynamics.

Louis Faucon, Treasurer of the Tournesol Association

The Treasurer of the Tournesol Association is Dr. Louis Faucon.


The current two Auditors elected at the Constitutive Assembly, on April 20, 2021, for a period of two years.

Dalia Papuc is a PhD student in computer science at EPFL. She received her master's degree from Vrije Universiteit Amsterdam, where she has also been a Teaching Assistant and Student Ambassador. She has previously been part of the Board of the Electrical Engineering Students' European Association and volunteered for the Gender Equality Festival, among others.

Orfeas Liossatos is a second-year Bachelor student in computer science at EPFL. He's currently a Student Assistant for Digital System Design at EPFL as well as a cellist with OSUL.


All members of the Board and all Auditors are also individual Members of the Tournesol Association. In addition, the Association has also the following Members.

Professor El Mahdi El Mhamdi is an Assistant Professor at the École Polytechnique in Paris, France, and a Google Brain researcher. He received the best PhD thesis award of the IC school at EPFL. He also co-authored Le Fabuleux Chantier with Dr. Lê Nguyên Hoang.

Professor Alexandre Maurer is an Assistant Professor at the Mohammed VI Polytechnic University in Ben Guerir, Morocco.

Dr. Vlad Nitu is a junior researcher at CNRS in Lyon, France.

Dr. Mithuna Yoganathan obtained her PhD from Cambridge University. She also runs the YouTube channel Looking Glass Universe, with 200k+ subscribers.

Mariame Tighanimine is a PhD student in social sciences at LISE, CNAM-CNRS.

Anastasiia Kucherenko is a PhD student in computer science at EPFL.

Sébastien Rouault is a PhD student in computer science at EPFL.

Felix Grimberg is a PhD student in computer science at EPFL.

Isabela Constantin is an Innovation and Product Manager at UNFINISHED. She previously received her Master's from EPFL, and worked as an AI resident at Microsoft.


The following is a list of the current sympathizers of the Tournesol Association:

  • Tomas Turner.
  • Peva Blanchard.

Identification numbers

The "numéro d'identification des entreprises (IDE)" of the Tournesol Association is CHE-269.536.932.

The bank account's IBAN is CH42 0900 0000 1569 4102 5.

Its BIC number is POFICHBEXXX.


Note that the French version is authoritative.


Orfeas Liossatos, Auditor of the Tournesol Association

The creation of the Tournesol Association is the outcome of five years of reflections and daily discussions, around the social risks of learning algorithms. These discussions then crystallized into a weekly reading group of articles relevant to the security and ethics of algorithms, and culminated in 2019 with the publication of the book "Le Fabuleux Chantier", co-authored by Lê Nguyên Hoang and El Mahdi El Mhamdi, and published by EDP Sciences. An English translation is forthcoming.

The ideas from the book then led to the launch of the Tournesol Project in May 2020, via the creation and development of the web platform The name "Tournesol" was proposed by Louis Faucon as it refers to turning to the sun (“tourne”: turns, “soleil”: sun).

Legal form, purpose and seat

Art. 1

Under the name of "Association Tournesol", a non-profit Association is created, governed by the present statutes and by Articles 60 and following of the Swiss Civil Code.

Art. 2

The purpose of the Association is to...

  • Develop, maintain and promote the Tournesol Project, which aims to collect and leverage the judgments of a large number of contributors to identify content of public utility.
  • Contribute to the understanding of the social risks due to the most influential algorithms.
  • Contribute to making the most influential algorithms robustly beneficial to all humanity.

To achieve its purpose, the Association may undertake the following:

  • Hire developers to maintain Tournesol and integrate external contributions.
  • Hire contractors for occasional software development tasks.
  • Maintain the Tournesol Wiki, to explain the motivation, specifics and challenges of the Tournesol Project.
  • Manage and support the Tournesol user community.
  • Participate in academic research on the ethics and security of algorithms.
  • Produce and support the production of educational materials on the ethics and security of algorithms.

Art. 3

The seat of the Association is in Lausanne, in the canton of Vaud. Its duration is unlimited.


Art. 4

The organs of the Association are :

  • the General Assembly ;
  • the Board ;
  • the Auditors.

Art. 5

The resources of the Association are constituted by the ordinary or extraordinary membership fee of its Members, by donations or legacies, by products of the activities of the Association and by subsidies from public authorities.

The financial year begins on January 1 and ends on December 31 of each year.

Its commitments are guaranteed by its assets, to the exclusion of any personal liability of its Members.


Art. 6

The members of the Association ("Members") are individuals or legal entities who have an interest in the purpose and activities of the Association and/or who wish to support them.

Art. 7

The Association is composed of :

  • Individual Members ;
  • Collective Members ;
  • Sympathizers.

Thereafter, “Members” refer to Individual Members and Collective Members.

Art. 8

Applications for the admission of new Members shall be addressed to the Board.

The acceptance of a new Member requires the unanimous consent of the Board.

The Board shall inform the General Assembly.

Art. 8a

Applications for the admission of new Sympathizers shall be addressed to the Board.

The acceptance of a new Sympathizer requires the consent of a member of the Board.

The Board shall inform the General Assembly.

Art. 9

Membership and support are lost:

a) by resignation. In all cases, the membership fee for the year remains due.

b) by exclusion, without giving reasons.

Exclusion is the responsibility of the Board. The person concerned may appeal against this decision to the General Assembly.

Art. 9a

The list of the Members and Sympathizers of the Association is public.

General Assembly

Art. 10

The General Assembly is the supreme authority of the Association.

It includes all Members of the Association.

Sympathizers are also invited and can intervene, but they do not have the right to vote.

Assuming the availability of space, external entities can also attend, but they have the duty to remain silent, and they do not have the right to vote.

Article 11

The powers of the General Assembly are as follows:

  • to adopt the agenda of the Assembly and approve the minutes of the last Assembly
  • to take note of the reports, the accounts for the financial year and the budget, and votes on their approval.
  • to discharge the Board and the Auditors of their mandate.
  • to elect the President, the Treasurer and the Secretary.
  • to elect the members of the Board and the Auditors.
  • to adopt and modify the statutes.
  • to hear and deal with appeals for exclusion.
  • to set the annual fee for Individual and Collective Members.
  • to take position on other items on the agenda.

The General Assembly may take up or be taken up any matter which it has not assigned to another body.

Article 12

The General Assembly shall meet at least once a year at the invitation of the Board.

The Board may convene an Extraordinary General Assembly as often as the need arises. The Extraordinary General Assembly shall also be convened at the request of at least one fifth of the Members of the Association.

Art. 13

The Assembly is convened at least 20 calendar days in advance by the Board. The invitation is sent by e-mail and includes the agenda of the Assembly.

Art. 14

The Board is obliged to include in the agenda of the (Ordinary or Extraordinary) General Assembly any proposal of a Member submitted by e-mail at least 10 calendar days in advance.

Article 15

The General Assembly is chaired by the President of the Association or another Member proposed by the Board.

The Secretary of the Association or another member of the Board shall keep the Minutes of the Assembly; they shall sign them together with the President of the Assembly.

Article 16

Decisions of the General Assembly shall be taken by a simple majority of the votes cast, not counting abstentions and any invalid ballots. In the event of a tie, the chair of the meeting has the casting vote.

If the number of alternatives is greater than or equal to 3, the Board may decide to use the Condorcet ballot to determine the decision of the General Assembly. Again, only the votes cast are counted, and the vote of the chair of the meeting decides ties or Condorcet paradoxes among the Condorcet co-voters.

Decisions concerning the modification of the statutes can only be taken by a 2/3 majority of the Members present.

Art. 17

Voting takes place by show of hands or via a trusted web application. At the request of at least a fifth of the Members, they will be held by secret ballot. There is no voting by proxy.



The Board shall execute and implement the decisions of the General Assembly. It leads the Association and takes all necessary measures to ensure that the stated purpose is achieved. The Board decides on all matters not expressly reserved for the General Assembly.


The Board consists of at least three members, including the President, the Secretary and the Treasurer, appointed for two years by the General Assembly and eligible for re-election.


Decisions are made by electronic means, provided that no member of the Board requests an oral deliberation. In this case, and in the absence of consensus, decisions are made by a simple majority of the members present.

Art. 21  

In case of vacancy during the term of office, the Board can be completed by co-option until the next General Assembly.

Art. 22

The members of the Board of the Association work on a voluntary basis, subject to the reimbursement of their actual expenses.

Art. 23

The Association is validly committed by the collective signature of two members of the Board.

Art. 24

The Board is responsible for :

  • taking the necessary measures to achieve its objectives;
  • convening ordinary and extraordinary general meetings
  • taking decisions concerning the admission and resignation of members as well as their possible exclusion;
  • ensuring the application of the statutes, to draft regulations and to administer the assets of the Association;
  • keeping the accounts of the Association.

Art. 25

The Board hires (dismisses) the Association's salaried and voluntary employees. It may entrust any person from within or outside the Association with a limited term of office.


Art. 26

The Auditors shall audit the financial management of the Association and submit a report to the General Assembly. It is appointed by the General Assembly.


Art. 27

The dissolution of the Association shall be decided by the General Assembly by a two-thirds majority of the Members present. Any remaining assets shall be donated to a Swiss tax-exempt institution with a public utility or public service purpose.

The present statutes have been adopted by the Constitutive Assembly of April 20, 2021 in Lausanne.