 The defining claim of SW Neo-Kantianism is that there are universally valid norms, and every universally valid norm has an a priori  ground.[19]  The concept of the a priori is therefore not a psychological or biological notion (the a priori is not the innate), nor is it an anthropological notion (the a priori is not what is universally assented to). The a priori are norms, the recognition of which is indispensable for normative activities. In theoretical philosophy, the a priori are norms the recognition of which are necessary for making universally valid judgments—judgments that make a claim to truth, truth for every other cognizer. These a priori theoretical norms include the laws of logic. For natural science, the law of causality is an a priori norm; for history (see  section 3.3),  it is a priori that there are universal values that make certain individuals historically significant (Rickert 1902: 334). Similarly, there are universally binding norms in ethics and aesthetics, which make it possible that certain actions and emotions are universally valid.