A thrown ball falls in a parabola. Jezus!

[Edit]
Oops! I got schooled.
http://www.lhup.edu/~dsimanek/scenario/secrets.htm

Anyone who is not shocked by quantum theory has not understood it.
-- Niels Bohr

Such fun stuff.

I think it's worth making the distinction here between predictable and deterministic. Determinism, of the outcome determined by initial conditions sort, isn't a testable position and therefore can't be ruled out entirely by experiment because you can't roll the universe back to the same state repeatedly and see what happens. Experiments testing Bell's inequality, for instance, can't rule out concepts like superdeterminism.

I was gonna say how can we prove that which way the cat "flips" isn't also somehow also determined by a factor we can't measure. I suppose its kind of irrelavent. If we can't measure it then to all intents and purposes it may as well be random.

Anyway, I remember as a kid thinking that if we could build a machine with enough inputs then we could predict the future perfectly. I then got to thinking about the kind of paradox this would cause - getting a prediction of the future would change the future unless the machine also somehow could account for this. Anyway, I was quite disappointed when I learnt about quantum, although I thought perhaps it was the universe's failsafe against the sort of paradox i imagined this machine would create

Anyway. Reality is fucking wierd.

Anybody else notice he never actually came out and answered the question in plain English.

It is often stated that of all the theories proposed in this century, the silliest is quantum theory. In fact, some say that the only thing that quantum theory has going for it is that it is unquestionably correct.
-- Michio Kaku