Our team

Dr. Malte Engel

Founder and Trainer

Dr. Malte Engel studied philosophy, psychology and English literature. From 2007 to 2010, he received a scholarship from the Berlin School of Mind and Brain to complete his doctorate at the Chair of Ethics at the Humboldt University of Berlin. The dissertation was published in 2011 under the title “Cognitive Abilities as a Condition of Moral Responsibility” by Königshausen and Neumann in Würzburg. He has several years of teaching experience in the academic and non-academic field. Since the beginning of 2012 he has been teaching seminars on correct argumentation. In 2014 he trained as a trainer and was certified by the German Association of Certified Trainers and Business Coaches (BZTB).

Christina Sauer


Christina Sauer studied political science and history at the Eberhard Karls University of Tübingen and at the University of Potsdam. She spent a year abroad at the University of New South Wales in Sydney. For seven years she coordinated the Berlin Development Education Programme as a project manager. She has many years of teaching experience in the non-university sector. In 2013, she completed a degree in German as a Foreign Language at the Goethe-Institut and has since been working as a lecturer for language courses. She is also co-founder of the language school co-speaking berlin where she is responsible for course coordination.

Dr. Jonas Zahn


Dr. Jonas Zahn studied philosophy, logic and sociology in Basel, Chicago and Leipzig. In 2019 he completed his PhD in Philosophy at the Department of Philosophy of the University Leipzig. In his thesis he investigates the action-guiding and objective character of moral judgments. Jonas Zahn has several years of academic and non-academic teaching experience, including courses in sociology, philosophy, logic and argumentation theory. Since 2019 Jonas Zahn teaches workshops on logic and critical reasoning as well as thesis defense trainings for PhD students.

Dr. Anja Berninger


Dr. Anja Berninger is a lecturer at the Philosophy Department of the University of Göttingen. She studied philosophy, musicology and psychology in Bonn, Nanjing (China) and Berlin. After completing her MA, she worked as a management consultant for the Boston Consulting Group (Berlin). She received her PhD from the University of Stuttgart in 2015 with a thesis on current emotion theory. The dissertation was awarded the Dissertation Prize of the Association of Friends of the University of Stuttgart. She has several years of teaching experience in academia and has completed a one-year training course at the Writers’ Studio in Vienna to become a process-oriented writing coach.

Kai Hüwelmeyer


Kai Hüwelmeyer studied physics and philosophy in Tübingen, Manchester and Frankfurt. He completed his degree in philosophy with a thesis on the objectivity and truth of moral statements. Since 2017 he has been looking at how moral opinions can be justified in the face of disagreement, as part of his PhD thesis. The project is funded by the Foundation Polytechnische Gesellschaft Frankfurt. Kai Hüwelmeyer has several years of academic teaching experience in physics and mathematics as well as in philosophy and logic. In addition he frequently gives workshops on human rights activism.

Dr. Friederike Schmitz


Dr. Friederike Schmitz studied philosophy and German literature. She finished her PhD in Heidelberg with a thesis on the nature and methods of philosophy. After her dissertation she had a postdoc position at Freie Universität in Berlin. She’s the author of two books on animal ethics and provides trainings on logic and argumentation as well as science communication. She has academic and non-academic teaching experience.

Dr. David Lanius


Dr. David Lanius is a research associate at the DebateLab of the Karlsruhe Institute of Technology (KIT) and founder of the Forum für Streitkultur. He studied philosophy, linguistics and logic and received a scholarship from the German National Academic Foundation (Studienstiftung des Deutschen Volkes) to study strategic uncertainty in law at the Humboldt University of Berlin. During his studies and doctorate David Lanius was at the Universidad Complutense de Madrid (Spain), at the Institute of Logic, Language, and Computation in Amsterdam (Netherlands) and at the University of Southern California in Los Angeles (USA). He has several years of teaching experience in the university and non-university sector.

Sanja Dembić


Sanja Dembić studied philosophy, psychology, and gender studies. Since 2014 she is working on her PhD at the Institute of Philosophy at the Humboldt-University as a scholarship-holder of the German National Academic Foundation (Studienstiftung des Deutschen Volkes). In her dissertation with the working title “The Mind and its Deviances – Philosophical Foundations of Psychpathology”, she analyzes the concept of mental disorder and its relation to the concepts of bodily disorder and social deviance. She has many years of academic teaching experience.

Gordon Naninga Fließ


Gordon Naninga Fliess has studied Philosophy and Sociology. From 2012 to 2019 he worked for the international Ramboll Group, where he was a public sector management consultant. He has worked in different policy fields from family to economic and innovation policy. His clients mainly were federal and state administrations as well as economic development agencies and other organisations. He worked on evaluations and studies as well as on strategies and civic participation. He is an experienced presenter and workshop host. His central concern is the argumentational literacy and its use as an instrument in the professional communication between colleagues as well as betweenorganisations.

Stephan Naguschewski


Stephan Naguschewski completed his studies in analytical philosophy and German philology in Göttingen and St. Andrews with honors in 2005. His master’s thesis was concerned with Wittgenstein and mathematical necessity. In addition to this the key fields of his studies were logic, epistemology and philosophy of language. From 2004 until 2008 he was part of the editorial staff of “Kindlers Neues Literaturlexikon“. He has been working as freelance editor and translator since 2007. Furthermore he has worked as teacher for German as a Foreign Language in the German Language School several times. Since 2003 he has been gaining academic and non-academic teaching experiences.

Jan Claas


Jan Claas studied philosophy in Heidelberg and Hamburg, where he finished his PhD. His thesis was about Bernard Bolzano, the Bohemian philosopher and mathematician, focusing on his contributions to the philosophy of language. During his studies, Jan Claas was a visiting student at Yale University, New Haven (USA) as well as a visiting researcher at the university of Salzburg. He has been teaching logic for years and he has been the instructor of numerous seminars in philosophy that cover a variety of topics.