Less hypothetically, most of the atoms in a complex living organism are replaced...

Koshkin on June 10, 2017 | parent | context | favorite | on: Be Careful with UUID or GUID as Primary Keys

Less hypothetically, most of the atoms in a complex living organism are replaced every few months. (One objection could be that atoms of the same sort are all identical, but that makes the issue of 'identity' even more complex.)