 The evidence question dominated the anglophone literature on personal identity from the 1950s to the 1970s (good examples include Shoemaker 1963, 1970 and Penelhum 1967, 1970). It is important to distinguish it from the persistence question. What it takes for you to persist through time is one thing; how we ought to evaluate the relevant evidence is another. If the criminal had fingerprints just like yours, the courts may conclude that he is you. But even if they are right to do so, having your fingerprints is not what it is for a past or future being to be you: it is neither necessary (you could survive without any fingers at all) nor sufficient (someone else could have fingerprints just like yours).