The following contains spoilers on a fictional work.
In Westworld season 2, last episode, when a person/host X passed through “the door”, he got copied, almost perfectly, into a virtual world. Since the door was adjacent to a cliff, just after passing through it, the original copy (the physical body) fell off the cliff and then died.
Did X still exist after passing through the door?
Existence or non-existence of X is not a property of X itself. So in order for the question “does X exist” to be meaningful, we have to specify “with respect to whom”.
In other words, instead of “does X exist”, we should ask
With respect to the observer Y, does X exist?
There are 3 categories of possible observers (who were observing X passing through the door):
- the original person (X1)
X_1 == X
- the copied person (X2) in the virtual world
For simplicity, assume that X2 is a perfect copy of X.
other people (Y)
— Me@2019-02-09 1:09 PM
2019.02.28 Thursday (c) All rights reserved by ACHK
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