This chapter discusses theories of truth and justification. It covers the correspondence theory of truth, which states that a belief is true if it corresponds to facts in the real world. The coherence theory says a belief is true if it coheres with other beliefs. Justified true belief is traditionally seen as knowledge, but Gettier problems show this may be incomplete. Foundationalism and coherentism are theories of justification that appeal to either basic beliefs or a coherent web of beliefs respectively.