The ordinary distinction between being justified and being able to give a justification is described. Being able to give a justification requires metacognition; being justified doesn’t. Animals are sometimes justified in what they believe; sometimes they’re not. A definition for justification is given by analyzing a justification j of a proposition p in terms of j providing a truth-conducive reason for p. Two forms of justification are revealed along the lines of how propositions are justified, an inferential form and a representational form. Infinitism, the suggestion that infinite chains of justifiers—both deductive and truth-enhancing—are cogent, is then explored. It’s shown both that infinitary chains of justifications can’t function as additional forms of justification and that they can’t be used as provisional justifications either.
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