According to Brentano, a priori truths can be derived from concepts originating in perception. Although the origin of such a concept is empirical, the judgment that ana-lyzes it is a priori. In Brentano's terminology, it is an ana-lytic a priori truth valid for experience. I will begin this chapter with an explanation of Brentano's teachings on the question of a priori judgments and judgments "grounded purely in concepts." The latter form the background to Husserl's problems.