 In non-regimented usage, “risk” and “uncertainty” differ along the subjective—objective dimension. Whereas “uncertainty” seems to belong to the subjective realm, “risk” has a strong objective component. If a person does not know whether or not the grass snake is poisonous, then she is in a state of uncertainty with respect to its ability to poison her. However, since this species has no poison there is no risk to be poisoned by it. The relationship between the two concepts “risk” and “uncertainty” seems to be in part analogous to that between “truth” and “belief”.