That is untrue. We can predict, for example, that a quantum event will indeed be a quantum event and not a macroscopic event. We know that it will be a particle decaying, or whatever, and not, say, a giraffe springing out of nowhere. We can also predict that each quantum event, once it occurs, will faithfully obey the well-known laws of quantum theory.vicdan wrote:No, it doesn't. Weather is deterministic but chaotic (it's not even pseudorandom). meaning, it can be predicted in theory, but the actual prediction algorithm is intractable.David Quinn wrote:The weather on the 6th June, 2050, cannot be predicted by us in the here and now, but that doesn't mean it will be random.
Note however that chaotic systems can generally be predicted with great accuracy to a narrow limit -- e.g. we can very accurately predict weather one day in advance, because one day in advance the intractable chaos has not yet gone beyond the range of our predictive power.
This is in stark contrast with quantum non-determinism, where we cannot predict even a single quantum event. That's because, while weather is chaotic and thus predictable within narrow constraints, quantum events are truly random and thus aren't predictable. At all.
Indeed, if quantum events were truly unpredictable, then quantum mechanics wouldn't be able to work at all. It wouldn't be the powerful predictive tool that it is. So it is nonsesnical to say that quantum events are unpredictable. They are, for the most part, very predictable. It is just one or two aspects of their behaviour which we haven't yet found a way to predict to our satisfaction.
Ah, the ugly beast of interpretation is rearing its head again. No, at best, all we can say is that our current theories cannot make the necessary predictions - and that is all. To say anything more than this is to indulge in blind faith.DQ: Quantum non-deterministic events might appear to be random (i.e. incapable of being predicted) to us in the here and now, but this could easily change with new theories in the future
Victor: Indeed. And bats could fly out of your ass in the future, too. Doesn't mean you should set up a bat trap in your chair, does it?
As best as we can determine, quantum events are truly random.
Two things:We know from observed evidence that they cannot be explained as non-random involved any local hidden variables. meaning, any hypothesis trying to conceive of quantum events as determinsitic, relying on local hidden variables, is automatically proven false by empirical evidence before it's even formulated.
- Nothing is ever "proven false" by empirical observation. Just because we can't currently observe local hidden variables doesn't mean there aren't any.
- Determinism doesn't necessarily depend on the presence of local variables. David Bohm's interpretation, for example, is entirely deterministic even though it doesn't posit hidden local variables.
At the moment, Victor. At the moment.We do not have a prediction algorithm for quantum events, and AFAWCT, such an algorithm doesn't exist.
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