Since it hit the headlines and aroused the interest of scholars, the phenomenon of post-truth has received two main different interpretations: someone has observed that in the phenomenon there is nothing really new: lies and fakes always existed and the only real difference is represented by the speed with which today, thanks to the means of communication, they spread. Others, on the other hand, have emphasized the close relationship between postmodernism and post-truth, arguing that the first one is the ideological background of the second one. Our paper aims to show that in order to frame post-truth in the right perspective, we need the theoretical framework offered by the rhetoric. In fact, we will try to show that this theoretical frame...