same
mereological extent.

But in any case, the "identity conditions" that Nicola advocates
are orthogonal to the perdurantist, endurantist, or Whiteheadian
views.  The ones Nicola recommends were first proposed by Peter Geach
in 1967, and they have been very severely criticized ever since.
On of Geach's "intuitions" for his identity criteria is to explain
the Christian position of "three persons in one God".  Personally,
I prefer St. Patrick's explanation using a shamrock.

John Sowa

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