(urth) 5HC : Skinner, Turing and yet more Laplace

[Dan'l Danehy-Oakes]

> [T]he issue isn't what the demon knows, it's what _you_,
> as the person who has just been given the prediction, are correct in
> believing; the implication being that there's no determinate plan of your
> future actions that you'd be correct in believing if only you knew it.

If I were given a determinate plan of my future actions, the first
thing on the list would be "burn this document." And I would.

Obviously, a lot of this kind of speculation is reflected in 
myths and stories about the working-out of prophecies by those 
who try to avoid them (Oedipus, the Appointment in Samarra, 
etc.) - a great deal of effort has been gone to over the ages to 
show that predestination and free will are not inherently 
incompatible concepts.

> Thus, even if your actions are in some sense determined by the laws 
> of physics, this isn't quite the same as metaphysical determinism, 
> where you'd expect there to be a determinate plan of your future
> actions that would remain correct if you knew it.  I think.

I guess the question is whether the plan takes into account your
knowledge of the plan. 

Suppose I have been given such a plan and, foolishly, read the
first page of it. I would immediately be tempted to do something
other than the first thing it said. If I then returned to the plan,
would it say, "Reading the above, he decides to do something
else?" Would it have changed to show what I actually did do?
Or would it now be an utterly inaccurate plan? Might it self-
destruct?

I agree with what I take to be the point - a detailed foreknowledge
of one's own actions can be self-defeating.

> [1] It's due to an idea for a 'Black Easter' - style short story I keep
> thinking of writing, hampered mostly by my lack of talent, time and the
> unfortunate fact that I've never read 'Black Easter'.

You really should, but preferably in context - if you don't know (and
I am not assuming you don't, just not assuming you _do_ eithe),
it's part of the second volume of a trilogy - a _true_ trilogy, three 
thematically linked novels, rather than a three-novel series or a 
three-volume novels. The theme is the permissibility of secular
knowledge in the context of the Christian faith. The novels are
1. _Doctor Mirabilis_ - realistic/historical.
2.  _Black Easter_ and _The Day After Judgement_ - contemporary
    dark fantasies, sometimes published in one volume as _The
    Devil's Day_.
3. _A Case of Conscience_ - future SF.

--Dan'l

-- 
"We're going to sit on Scorsese's head"
     -- The Goodfeathers