John Clark wrote:
> >>It two things can be exchanged and no change can be detected by the
> >>outside world then the two things are identical.
> >christophe delriviere <email@example.com
> >Ah, but we are not in quantum mecanics here, brains are macroscopic
> >objects, so we can track their positions in space-time.
> How can you track them? If your brain and mine are identical then there is no
> way to determine if they've switched positions or not, and it wouldn't matter
> if they did.
The very language you use betrays the assumption that they are not, in fact, identical. To wit, "positions" is plural, and perfect identity would require that they have an identical position, no?
firstname.lastname@example.org (for now).