The theory of social representations must be understood in terms of its proper epistemology so that it can accomplish its full potential in social sciences. This is often difficult to achieve because researchers comprehend it in terms of concepts that are part of static and individualistic Newtonian epistemology rather than in terms of dynamic and relational Einsteinian epistemology. This article considers three signposts that Moscovici identifies and analyses in the theory of relativity, namely the relation between epistemology and science, theory and method, and the argument against the explanation of effects by their causes. The following question is posed: are these signposts also characteristic of the theory of social representations? This question is examined focusing on interactional epistemology, theory and method and the diversity of natural thinking and communication. Moscovici's Psychoanalysis shows that natural thinking appears in a plurality of modes according to the situation in which it takes place and according to social groups towards which it is directed. Natural thinking is controversial and communication-centred. Different professionals, groups and lay people use different kinds of speaking and different communicative genres when they try to resolve "the same" problem. The article suggests that bringing together dialogicality, dialogical linguistics and the theory of social representations may open up new possibilities for theoretical developments in social psychology. Key words: theory of social representations; interactional epistemology; Einstein's triangle of relations; natural thinking; dialogicality, dialogical linguistics During my dialogues with Serge Moscovici some years ago I posed him a question concerning the relation between the theory of social representations and the minority/majority innovation. He insisted that these two theories were separate from one another and that they had different aims, purposes and concepts. Nevertheless, it was my view that these two theories shared philosophical and epistemological presuppositions on which they were built. Serge Moscovici has worked on these theories more or less simultaneously, although during certain periods he has devoted more intellectual effort to one rather than to the other. So I insisted: "These two theories have the same philosophical basis." "Maybe" he responded, "I do not think that I am split into two different persons, so they probably share something, but they are independent theories." Serge Moscovici has been always concerned with the theoretical and epistemological basis of social psychology as well as with that of his own work, and he has written extensively about these issues. Of course, such complex questions can be approached from diverse perspectives depending on the problem under study. For example, in considering the relation between social influence and cognition, in order to make his point, he has chosen to contrast epistemologies of minorities and majorities (Moscovici, 1993). On the other hand, t...