 But here too critics have relied on the comparison with monozygotic twins. Harris (1997, 2004) and Tooley (1998), for example, have pointed out that each twin not only has a distinct identity, but generally also views him or herself as having a distinct identity, as do their relatives and friends. Moreover, so they argue, an individual created through cloning would likely be of a different age than her progenitor. There may even be several generations between them. A clone would thus in essence be a ‘delayed’ twin. Presumably this would make it even easier for the clone to view herself as distinct from the progenitor than if she had been genetically identical to someone her same age.