 That brings up the second reason why constructivism can be an elusive target: it has often rested on (perfectly reasonable) claims about the role that value judgments have played in medical practice, or on the prevalence of culturally specific disagreements about abnormal human behavior or physiology. This means, as we shall see, that constructivists, especially in the social sciences, do not tend to offer necessary and sufficient conditions. Rather, they often seek to reconstruct the concept of disease as revealed by our practices. Constructivism, therefore, often looks like a thesis about how inquiry is carried on: first we identify a condition we disvalue, then we look for a biological process that causes it and say that, whatever it is, it is abnormal. This stress on our practices is a common constructivist trope, whereas objectivists more often seek to analyse a concept that will clarify what disease really is, however fumbling and biased our attempts to uncover it may have been.