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  1. Dictionary
    E·pis·te·mol·o·gy
    /əˌpistəˈmäləjē/

    noun

    • 1. the theory of knowledge, especially with regard to its methods, validity, and scope. Epistemology is the investigation of what distinguishes justified belief from opinion: "he grappled with metaphysics and epistemology in his writings and sermons"