From: Robin Hanson (hanson@econ.berkeley.edu)
Date: Tue Aug 18 1998 - 11:55:00 MDT
Nick B. writes:
>> >The conclusion of the self-indication axiom is even stronger:
>> >if infinite universes are possible, then it is a priori *certain*
>> >that the universe is infinite.
>
>... read "prob one" and "prob zero" if you want -- you
>still get a heavy conclusion. Do you accept it? That sitting in your
>armchair you can ascertain that the probability that the
>universe is infinite is one? (And it's hard to see how this
>conclusion could be changed by any empirical evidence.)
The conclusion depends on whether I assign a zero or non-zero prob
to infinite universes. This "prior" can be "posterior" to other
considerations. It's not at all obvious to me that other evidence
can't influence this.
This is typical stuff when you have proabilities about infinities;
I don't see that this should bother me more here than elsewhere.
Robin Hanson
hanson@econ.berkeley.edu http://hanson.berkeley.edu/
RWJF Health Policy Scholar, Sch. of Public Health 510-643-1884
140 Warren Hall, UC Berkeley, CA 94720-7360 FAX: 510-643-2627
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