home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!mcsun!uknet!edcastle!aiai!jeff
- From: jeff@aiai.ed.ac.uk (Jeff Dalton)
- Newsgroups: sci.philosophy.tech
- Subject: Re: Free Will?
- Message-ID: <7008@skye.ed.ac.uk>
- Date: 24 Jul 92 16:02:37 GMT
- References: <14900001@hpspdla.spd.HP.COM>
- Organization: AIAI, University of Edinburgh, Scotland
- Lines: 68
-
- In article <14900001@hpspdla.spd.HP.COM> ric@hpspdla.spd.HP.COM (Ric Peregrino) writes:
-
- >Let's say God created the universe and Adam. God, being perfect, knew
- >the exact (no uncertainty) condition of the universe and Adam, and also
- >knew the "true" laws of physics. God then calculated what Adam was
- >going to have for dinner, went down and told Adam, "Adam, you will have
- >spam for dinner". Now Adam hates spam.
-
- Of course, hating X doesn't mean you won't have X for dinner, even
- if you make great efforts to avoid eating X. It might turn out that
- you end up having X despite everything you've done.
-
- >Does Adam have a choice for dinner?
-
- Not clear. (See below.)
-
- >Must he eat spam or can he have lobster?
-
- If God is omniscient, and he knows Adam will eat spam, then that's
- what Adam will eat. If God has to perform some calculations, I'd
- say the situation is more or less the same, assuming (as you do
- above) that the calculations can be performed.
-
- >In essence, does free will preclude a deterministic physics?
-
- There are a number of "compatiblist" arguments in philosophy that say
- no: free will is compatible with determinism. Some similar arguments
- might be used to argue that Adam does have a choice. Of course, not
- all philosophers think these arguments are correct, and there is some
- dispute about just what "determinism" means.
-
- >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?
-
- Uunpredictability would preclude such things. Whether free will
- would preclude them depends on whether or not free will is compatible
- with predictability (a difficult question).
-
- In any case, it's important to distinguish between unpredictability
- and free will. For instance, suppose your choices were determined by
- a random process. You'd be unpredictable, but you still wouldn't be
- choosing what to do.
-
- 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.
-
- >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).
-
- >Could an uncertainty in predicting human behaviour
- >manifest itself as free will? What would be conjugate to a human's decisions?
-
- See above.
-
- You'll note that I haven't actually presented any of the compatiblist
- arguments, though. You can find some in Dennett's _Elbow Room_.
- A good starting point for the free will literature in general is
- the collection edited by Gary Watson (Oxford University Press).
-
- -- jd
-