Faced with the proliferation of "fake news" and the emergence of "alternative" sciences, Claudine Tiercelin resurrects the idea of truth as a pillar of social justice and freedom.

In the era of "fake news" and alternative sciences, it might be easy to believe that everything is relative. This essay sets out to suggest the opposite. Countless misunderstandings circulate on the concepts of truth, knowledge, and reality, warped by the very notion of post-truth. By proposing that we be wary of our most deeply rooted metaphysical prejudices, this politically engaged philosophical essay invites us into a learned and democratic space of reason, the only such able to guarantee freedom of conscience. In so doing, this book demonstrates that the ideas of truth and knowledge are not so much a denial of life as true allies of our ideals of solidarity and social justice.