Foucault underlined, throughout his whole intellectual activity, the question of truth as an effect of power-knowledge. There are not properly truths as substances, but effects of truths as incorporeal practices of discourse, that change slowly, but inevitably, the limits of our knowledge. We can say then that he has always been a pragmatist, unbeknown to him. However, it was during the last two courses delivered at the Coll\ue9ge de France, recently published with the title of The Government of Self and Others and The Courage of Truth, that he recognized explicitly his pragmatic vein. I will show two specific points of his philosophical testament (as we can consider the two courses). Commenting Plato\u2019s Seventh Letter, he said the phil...