 Goodman (1955) draws a distinction between universal conditional generalizations that can be confirmed by their instances and those that cannot, where the former are said to be “projectible”. Those that can be projected from examined cases to unexamined ones are those that have a history of past projections. Thus, the predicate “black” has many past projections, but the predicate “blite” does not. Since a history of past projections enhances the projectibility of predicates only when they are successful, the measure of a predicate’s degree of projectibility, which Goodman calls its degree of entrenchment, is the relative frequency of its successful use in past predictions. Hume observed that, no matter how consistently a regularity has held in the past, that provides no guarantee it will continue to hold in the future. Goodman nevertheless adopted the past as a guide, which qualifies as his solution to the linguistic version of Hume’s problem of induction.