 There is, then, some ambivalence in Aristotle’s use of the term epistêmê. For our purposes in this article, we will leave suspended the question whether epistêmê in the strict sense is achievable in the study of nature. Still, we can recognize a secondary sense of epistêmê, since Aristotle in some contexts uses epistêmê although the strict conditions do not hold. One of these contexts appears to be the study of nature. Whether in the study of nature epistêmê in this secondary sense is the best that can be done or whether it can be converted into epistêmê in the strict sense, there is still a secondary sense of epistêmê, one that is not defined in terms of what is eternal and necessary. As we shall see, this secondary sense is important for understanding the relation between technê and epistêmê.