This work seeks to develop a critical epistemological investigation that will help enrich the debate on the possibility or impossibility of addressing social and humanistic sciences in a neutral or objective way. On the basis of an approach focused on the French post-structuralist theory and, more specifically, on the inputs provided by the Lcaniano psychoanalysis, it will be concluded that psychoanalysis, in its secular aspect, and taken up differently by other authors, such as Zizek, has consistently shown that this alleged objectivism is merely an impossible one. The objective reality can only be a utopia, as every reality is constructed by language, a symbolic order, which is contingent and therefore relative. Without simply relativising the current ‘post-modern’ approaches, the absence of the Truth in the upper case does not mean that there are no medium, ‘reduced’ truths, as they are called by Lacan in her work.