True, but a token machine only serves to identify the token machine, which presumably is only held by the person it identifies. I think my point is that at a fu

True, but a token machine only serves to identify the token machine, which presumably is only held by the person it identifies. I think my point is that at a fundamental level, identity is internal, tied to a person's mind/soul/etc. Anything external is fundamentally a supplemental identifier. People lose things, steal things, etc. but you cannot (as of yet) steal someone's thoughts.