belief and related issues such as justification and truth. Some conceive of epistemology as an attempt to refute skepticism, the denial that knowledge is possible. One of the major debates in epistemology is that of internalism versus externalism: Must the basis or ground that warrants a belief be internally accessible to consciousness? Another major debate is foundationalism versus coherentism: Are some beliefs “properly basic,” or are all beliefs based on other beliefs in an interconnected web?