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Author Topic:   Does Evolution Have An Objective?
caffeine
Member (Idle past 1053 days)
Posts: 1800
From: Prague, Czech Republic
Joined: 10-22-2008


Message 42 of 265 (619101)
06-08-2011 11:30 AM
Reply to: Message 41 by New Cat's Eye
06-08-2011 10:22 AM


Given that it seems blindingly obvious that a system that works by obeying a set of unwavering rules is wholly deterministic, you can't just say "it's not" without explaining why.

This message is a reply to:
 Message 41 by New Cat's Eye, posted 06-08-2011 10:22 AM New Cat's Eye has replied

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 Message 43 by New Cat's Eye, posted 06-08-2011 11:37 AM caffeine has replied

  
caffeine
Member (Idle past 1053 days)
Posts: 1800
From: Prague, Czech Republic
Joined: 10-22-2008


Message 49 of 265 (619199)
06-09-2011 4:17 AM
Reply to: Message 43 by New Cat's Eye
06-08-2011 11:37 AM


Catholic Scientist writes:
Well, he's just saying it is without explaining why, and you're just saying its blindingly obvious without saying why.
If the decision are not determined in the programming of how it chooses, then its not completely deterministic.
If it is completely deterministic, then its going to make the same move for each input and therefore its isn't really making the decision itself.
Maybe I missed the point, but Panda was saying he hadn't made the choices himself, since he had no idea from the algorithms he programmed what choices would be made. They're still deterministic, because the same sequence of inputs would always result in the same outputs.
On the wider issue, if you're saying that a deterministic decision isn't a choice, then I don't really see how choice is possible. If something is not determined by the conditions and events leading up to it, then its arbitrary. Does it make more sense to call that a choice?

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 Message 43 by New Cat's Eye, posted 06-08-2011 11:37 AM New Cat's Eye has not replied

  
caffeine
Member (Idle past 1053 days)
Posts: 1800
From: Prague, Czech Republic
Joined: 10-22-2008


Message 78 of 265 (619933)
06-13-2011 10:52 AM
Reply to: Message 75 by New Cat's Eye
06-13-2011 10:11 AM


Catholic Scientist writes:
quote:
I agree. Why do you imagine that determinism interferes with this concept?
It makes the outcome independent of our "choice".
Maybe this is just a semantic argument, but I think we're looking at this in different ways. The outcome isn't independent of your choice if your choice is predetermined. The outcome is the result of your choice, the point is just that your choice is the result of other factors.
You never answered my question earlier. If the choice is not predetermined, how is this in any way more simialr to what we mean when we say 'choice'. Something not dependent on its causes is essentially random, isn't it?
quote:
so the overall motion of the visible particle is deterministic
If you rewind and replay, will the particles follow the same paths?
I don't know if quantum mechanics change our understanding of this, but in classical physics - yes, that's exactly what would happen. Chaotic systems will behave in exactly the same way from identical starting conditions. The reason we have to treat them as random is because they're incredibly sensitive to the initial starting conditions, and we can't understand them in enough detail to be able to predict what will happen. It's like the example of hitting a billiard ball around on a frictionless table. If we know the angle and force or the hit, we can predict pretty well its path after the first few bounces, but pretty quickly the imprecision in our initial measurement multiplies to the point where we're unable to predict in advance the path of the ball. I remember reading an example from Henri Poincare, who calculated that, by the 20th rebound or so, the gravitational pull from distant objects has to be taken into account to get an accurate figure, but I can't find the source for this now.
Edited by caffeine, : No reason given.

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