 Next consider (3): this does not seem to be true simply because of the concepts it expresses. Rather, if it is true, it seems to reflect an important law of nature: a deep and non-accidental pattern in our universe. Some philosophers think that such laws underwrite a distinctive sort of modality: a proposition is nomically necessary just in case its falsity is incompatible with the laws of nature. On this view, (3) is nomically necessarily true, because it follows from the laws governing the speed of light.