The copyright fair use caselaw is more coherent and more predictable than many commentators seem to believe. Fair use cases tend to fall into common patterns, or what this Article calls policy-relevant clusters. The policies underlying modern fair use law include promoting freedom of speech and of expression, the ongoing progress of authorship, learning, access to information, truth telling or truth seeking, competition, technological innovation, and the privacy and autonomy interests of users. If one analyzes putative fair uses in light of cases previously decided in the same policy cluster, it is generally possible to predict whether a use is likely to be fair or unfair. Policy-relevant clustering is not a substitute for appropriate c...