 But constructivists often present their theories as unmasking common sense or medical conceptions of disease, and hence as a kind of revisionism. They may accept that diagnoses of ill-health involve objective facts that people appeal to, or presume that they can appeal to, when they say that somebody is sick. The assumption might be that germs or other medically relevant causal factors are present in a person and have given rise to visible phenomena that indicate ill-health. But a constructivist will claim that the actual, often unacknowledged, judgments driving the initial assertion that someone is unhealthy are derived from social norms. We may discover facts about obesity and its relationship to blood pressure or life expectancy. But the constructivist says that our search for the relevant biological findings is undertaken because we have already decided that fat people are disgusting and we are trying to find a set of medically significant properties in order to make our wish to stigmatize them look like a medical decision rather than a moral or aesthetic one. The crucial constructivist claim is that we look for the biological facts that ground disease judgments selectively, based on prior condemnations of some people and not others. Because they claim that social norms rather than disinterested inquiry drive medicine (and especially, psychiatry), constructivists tend to be revisionists about folk concepts, seeking to bring to light the unacknowledged sources of our concepts of health and disease. But constructivism could be a conservative view, aimed at uncovering our folk theory of health and disease. A constructivist who takes this view says that our folk concept of disease is that of a pattern of behavior or bodily activity that violates social norms. 