Ramsey’s Theory of Belief

Abstract

One of Frank Ramsey’s crucial contributions to philosophy is his theory of belief. Ramsey deals with the notion of full belief in “Facts and Propositions,” as well as that of degrees of belief in “Truth and Probability.” In his posthumously published manuscript OnTruth, Ramsey analyses beliefs and emphasizes the essential role of agent’s actions in his theory. In this paper, I follow Ramsey’s thoughts as they developed in consecutive essays all evolving around the concept of belief. I show how Ramsey considers partial and full beliefs, distinguishing between full, certain, and true ones. His final project was to be titled Truth and Probability, which means Ramsey was considering these issues simultaneously. I examine the strong influence pragmatism has on Ramsey’s thoughts to finally show that even though Ramsey is working with both these doxastic states his rejection of true beliefs for his final theory of belief becomes clearer with every essay. I will argue that Ramsey’s final theory of belief is a theory of partial belief. Moreover, I will provide arguments supporting a normative reading of Ramsey’s theory.