  The Buddha’s ‘middle path’ strategy can be seen as one of first arguing that there is nothing that the word ‘I’ genuinely denotes, and then explaining that our erroneous sense of an ‘I’ stems from our employment of the useful fiction represented by the concept of the person. While the second part of this strategy only receives its full articulation in the later development of the theory of two truths, the first part can be found in the Buddha’s own teachings, in the form of several philosophical arguments for non-self. Best known among these is the argument from impermanence (S III.66–8), which has this basic structure: