Re: (ReacTor) Five SF Novels About Rediscovering Ancient Tech

On Tue, 14 May 2024 22:46:26 -0400, Cryptoengineer
<petertrei@gmail.com> wrote:

On 5/14/2024 3:47 PM, Christian Weisgerber wrote:

On 2024-05-14, Paul S Person <psperson@old.netcom.invalid> wrote:
 

So, like the car in /The World's End/, it is the same in one sense,
and yet not in another since almost everything has been replaced.

 
Aka "Ship of Theseus".  People have been philosophizing about this
for at least two millennia.
 

I've read that there was a medieval idea that all the material in
a human's body was replaced over 7 years, and that this is where
the notion  that 21 should be the age of majority came from.

Oddly enough, I have run into the assertion that every cell in the
body is replaced every 7 years. Perhaps it's simply an updated
version.

Not all replaced at once, of course. Your "over 7 years" captures that
quite well.
--
"Here lies the Tuscan poet Aretino,
Who evil spoke of everyone but God,
Giving as his excuse, 'I never knew him.'"