Ernest Sosa

Ernest Sosa is a prominent philosopher known for his work in epistemology, or the study of knowledge. He distinguishes between internalism and externalism: internalism focuses on factors within a person's mental states for justified beliefs, while externalism emphasizes external elements like environment and reliability of belief sources. Sosa is also a key figure in virtue epistemology, which connects knowledge with the intellectual virtues of the knower, like openness and rigor. Additionally, his ideas contribute to contextualism, suggesting that the context in which knowledge claims are made influences their meaning and truth.