Not only can a name be changed, but many people have the same name. Thus, that branch can easily be cut off. A name cannot really separate one person from the other. But not only does appearance change with age, it can also be changed by surgery. It may serve a temporary purpose, but it cannot really be used to establish the concept of self.
Scientific experiments demonstrate that each person has a different voice pattern.
An instrument has even been devised by which a court may identify a person by his vocal pattern. But physical damage to the vocal apparatus can change that pattern, and certainly this means of identification is not applicable to mutes. Voice, therefore, also cannot permanently separate one person from another such that each person could justifiably be called a self. Fingerprints are commonly used to identify a person but, like the voice, are not perfect. One does not lose one 's concept of self even if one cuts off both of one 's hands.