Jerry Alan Fodor (; April 22, 1935 - November 29, 2017) was an American philosopher and cognitive scientist. He held the position of State of New Jersey Professor of Philosophy, Emeritus, at Rutgers University and was the author of many works in the fields of philosophy of mind and cognitive science, in which he laid the groundwork for the modularity of mind and the language of thought hypotheses, among other ideas. He was known for his provocative and sometimes polemical style of argumentation and as "one of the principal philosophers of mind of the late twentieth and early twenty-first century. In addition to having exerted an enormous influence on virtually every portion of the philosophy of mind literature since 1960, Fodor's work has had a significant impact on the development of the cognitive sciences."

In his article "Propositional Attitudes" (1978), Fodor introduced the idea that mental states are relations between individuals and mental representations. Despite the changes in many of his positions over the years, the idea that intentional attitudes are relational has remained unchanged from its original formulation up to the present time. In that article, he attempted to show how mental representations, specifically sentences in the language of thought, are necessary to explain this relational nature of mental states. Fodor considers two alternative hypotheses. The first completely denies the relational character of mental states and the second considers mental states as two-place relations. The latter position can be further subdivided into the Carnapian view that such relations are between individuals and sentences of natural languages and the Fregean view that they are between individuals and the propositions expressed by such sentences. Fodor's own position, instead, is that to properly account for the nature of intentional attitudes, it is necessary to employ a three-place relation between individuals, representations and propositional contents. Considering mental states as three-place relations in this way, representative realism makes it possible to hold together all of the elements necessary to the solution of this problem. Further, mental representations are not only the objects of beliefs and desires, but are also the domain over which mental processes operate. They can be considered the ideal link between the syntactic notion of mental content and the computational notion of functional architecture. These notions are, according to Fodor, our best explanation of mental processes.

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