Céline Joisten is a PhD student at the University of Liège in Belgium (ULiège). She is interested in the concept of “certainty” through tort law and, more specifically, certainty in the sine qua non condition. Starting from the observation that uncertainty is more and more present in tort law and that this phenomenon maintains a difficult relationship with causal certainty, her works analyse the mechanisms created by the judge or the legislator to treat this uncertainty. Loss of chance or proportional liability are two examples among others. The analysis focuses on Belgian law and French law but a comparative approach with Dutch law is very interesting to understand the specificities of its own law and the differences. Prior to starting a thesis, Céline completed a LLM Programme in Comparative and European Private Law at the University of Edinburgh, where she developed an attraction for comparative law. She had the opportunity to study private law in a comparative perspective and, more specifically, tort law and causal uncertainty. She wrote her dissertation on causal uncertainty in personal injury law with a comparison between English law and Belgian law. Related to her PhD works, Céline is also working on environmental law with Wallonia to found remedies against environmental risks.