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- Path: sparky!uunet!mcsun!uknet!edcastle!aiai!jeff
- From: jeff@aiai.ed.ac.uk (Jeff Dalton)
- Newsgroups: sci.philosophy.tech
- Subject: Re: Re: Free Will?
- Message-ID: <7023@skye.ed.ac.uk>
- Date: 30 Jul 92 17:16:47 GMT
- References: <14900002@hpspdla.spd.HP.COM>
- Organization: AIAI, University of Edinburgh, Scotland
- Lines: 62
-
- In article <14900002@hpspdla.spd.HP.COM> ric@hpspdla.spd.HP.COM (Ric Peregrino) writes:
- >Regarding free will I wrote:
- >
- >>>In essence, does free will preclude a deterministic physics?
- >
- >to which Jeff Dalton responds:
- >
- >>There are a number of "compatiblist" arguments in philosophy that say
- >>no.... Of course, not
- >>all philosophers think these arguments are correct, and there is some
- >>dispute about just what "determinism" means.
- >
- >I think the language is very clear, but let me make some simple definitions.
-
- You don't have to believe me, but so far as I can tell there really is
- some dispute about what "determinism" means. Moreover, the compatiblist
- arguments apply to fairly strong versions of determinism. I suspect
- that some would apply even to your version (which is not to say they're
- right).
-
- >A deterministic physics is one in which the outcome of an event can be known
- >before the event.
-
- I don't think this is what's usually meant by deterministic, unless
- "can be known" is taken in an ideal sense (ie, ignoring processing
- time and access to information). What's usually meant is more or
- less "given a state of the universe, only one sequence of later
- states is possible". Now this certainly sounds incompatible with
- free will, but there are arguments to the contrary.
-
- >Free will is the ability of a being to choose their
- >actions whithin the realm of possibility (ie. I can't choose to fly to
- >Mars today, but I can choose to post this note). Clearly a deterministic
- >physics thus defined precludes free will, and vice versa.
-
- I don't agree that it's clear, but you should look at the compatiblist
- arguments yourself and see what you think.
-
- >>>What about a QM type of solution where a probability of a human's
- >>>choice is all that could be calculated? Even still, if told the
- >>>probabilities, Adam could always choose the lowest probability just
- >>>to spite God.
- >
- >>He could, but it's unlikely that he'd do it very often (assuming, as
- >>we do, that God is right about the probabilities).
- >
- >But he could do it always if he had free will.
-
- This depends on what we mean by saying God is right about the
- probabilities. If the guy really is going to choose some
- "low-probability" option, why wouldn't God know this and take
- it into account?
-
- >I think this transfer of information will perturb his state
- >and alter the coeffecients A and B. Thus if I can know what a human
- >is going to do, then I can't tell him, otherwise it alters the outcome.
-
- I agree. But God presumably takes this into account.
-
- It depends on just what sort of knowledge we're allowing God to have.
-
- -- jd
-