ABSTRACT. The principle of the “uniformity of nature” states that reality is subject to natural laws. In this paper I argue that a weak version of the principle of the uniformity of nature is a necessary truth. According to this weakened principle, every reality for which the question of its subjection to natural laws can arise is subject to natural laws. I argue that this question arises only for a subject who knows of the existence of objective reality, qua objective (that is, reality which is independent of any knowledge of it). I show that a necessary condition for knowledge of objective reality, qua objective, is that the subject can acquire knowledge of past and future events, which he does not perceive directly through his senses, and that only natural (contingent) regularities enable the subject to do so. Hence, I conclude that every reality for which the question of its subjection to natural laws can arise is subject to natural laws. pp. 116–132

Keywords: Hume, Kant, natural laws, objectivity, uniformity of nature