 Roberto Torretti’s view of scientific knowledge finds its roots in his interpretation of Kant’s philosophy (Torretti 1967). According to Torretti, it does not follow from the transcendental deduction of the categories that they are contained in a definitive and immutable list; by admitting that the patterns ruling the constitution of the objects of knowledge may change, “Kant opens a wide door to intellectual pluralism” (2008: 87). From this perspective, Torretti (2000) explicitly rejects the scientific realism that conceives the aim of science as the development of a discourse that “cuts reality at its joints”, and agrees with Hilary Putnam’s pragmatic realism (Putnam 1987) on the basis of some examples drawn from past and present scientific practice.