Abstract

The concept of a positive instance has figured significantly in Hempel's study of confirmation. In fact, Hempel's study has been interpreted as an attempt to explicate the concept of a positive instance. In this paper I examine the concept of an instance and discuss its role in Hempel's study. I show that Hempel's notion of direct confirmation is closely related to that of a positive instance. This fact, however,does not warrant an uncritical identification of Hempel's explicandum with the concept of a positive instance, and I argue that such an interpretation of Hempel's study is grossly inadequate.