 The issue here undermines the importance of the role for explanations to provide understanding. The required validity brings semantic circularity, because the content of the explanans would then be sufficient for the truth of the explanandum. In line with the regular presentations of the DN model, at least one law of nature is required to be a premise in an “explanatory argument”. Indeed, at least one law needs to be essential to the validity of the argument, and the laws being part of the explanans are clearly a factor regarding the circularity. To add to these challenges, it is good to remember what Dretske pointed out regarding laws and explanation.