The distinction between Science and Pseudoscience is one of the central themes in the Philosophy of Science, interested in defining which practices and knowledge can be considered rigorously scientific and which are not. This question goes back to the very origin of philosophical thought, but it has acquired a more defined focus in the last century, with thinkers such as Popper, Kuhn and Lakatos proposing criteria to differentiate what constitutes valid scientific knowledge and what should be treated as pseudoscience or metaphysics. Despite several attempts, these criteria have often been criticized and, in some cases, abandoned. For example, philosopher Larry Laudan, in 1983, suggested that the search for a single and universal criterion to distinguish Science from Pseudoscience had failed, arguing that such an assessment must be made on a case-by-case basis. Recently, some thinkers, such as Pugliucci (2010) and Maartens (2021), have proposed an alternative approach, based on a more flexible perspective. Instead of looking for a single absolute criterion, they suggest taking inspiration from Ludwig Wittgenstein and considering a multiplicity of characteristics to define Science, without any of them being necessarily mandatory. From this perspective, Leonel Garcia-Marques explores a list of possible characteristics that, combined, would allow for a more flexible and comprehensive delimitation. Maartens also suggests that how pseudoscientists react to data that contradicts their theories may be an important key to this distinction. Thus, the theme presents itself as an investigation into the criteria and methods that help protect the integrity of Science, highlighting the importance of identifying and preventing pseudoscientific practices, with the aim of promoting a more robust and rigorous science. __ Leonel Garcia-Marques obtained his doctorate in 1993, under the supervision of David L. Hamilton, from the University of California Santa Barbara. Since 1985, he has been a professor at the Faculty of Psychology at the University of Lisbon, where he is currently a Full Professor and has held various positions, from Director of the Department, President of the Pedagogical and Scientific Councils and Coordinator of its Research Center. He was a member of the Executive Committee of the European Social Cognition Network, the International Social Cognition Network and the Lisbon Doctoral Program in Social Psychology (LISP), having a relevant role as editor and/or associate editor in the magazines British Journal of Social Psychology, Perspectives in Psychological Science, European Journal of Social Psychology and Personality and Social Psychology Bulletin (current editor position). His main research interests are in Psychology (on topics such as interaction between memory and learning, impression formation, stereotypes and cognitive processes in groups, design of social robots and relationships between judgment and decision making), also developing work in philosophy of science and epistemology of statistics. His works are published in the main journals in these areas.