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- From: ric@hpspdla.spd.HP.COM (Ric Peregrino)
- Date: Thu, 30 Jul 1992 01:31:54 GMT
- Subject: Re: Re: Free Will?
- Message-ID: <14900002@hpspdla.spd.HP.COM>
- Organization: HP Stanford Park - Palo Alto, CA
- Path: sparky!uunet!cs.utexas.edu!sdd.hp.com!hpscdc!hplextra!hpl-opus!hpspdla!ric
- Newsgroups: sci.philosophy.tech
- Lines: 63
-
-
-
- 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.
- A deterministic physics is one in which the outcome of an event can be known
- before the event. 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.
-
- >>Or does it preclude an exact description of the state of the entire
- >>universe? Or does it preclude the calculation of outcome in less time
- >>than the outcome will arrive?
-
- >That the calculation would take too long would also make actions
- >unpredictable, but that hardly means they were free. Nor would the
- >impossibility of completely describing the universe mean that
- >actions were free.
-
- Agreed.
-
- >>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.
-
- Thanks for the references.
-
- How about this. Hire a human to make a choice between two outcomes:
- drink one coke or one pepsi, every day. As the days go by, I'd gain
- a knowledge of this humans state function:
-
- A |coke> + B |pepsi> , where A^2 + B^2=1
-
- Now, after many days I can say with what probability I expect the
- human to drink coke, namely A^2. Let's say this human always drank
- coke. Then I'd get A=1, and make the prediction that he'd drink
- another coke today. But what if I tell him this fact? What if I
- told a lie and said I expected him to drink pepsi today? In either
- case 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.
-
- In this case the physics is probabilistic, not deterministic, with
- the additional constraint of not interacting with the observee to
- maintain the probabilistic results.
-
- ric@spd.hp.com
-