They're incontrovertible /facts/, Kennaugh. You agreed with all but
the last of them, and that one is a necessary consequence of the others.
Furthermore, those facts apply to ALL of Science - Physics doesn't
have any special epistemological status.
>
>>
>> The ONLY observable aspects of Nature are the sensory effects known as
>> natural phenomena.
>
> OK We gain data about nature through our senses and our extended sense -
> i.e instruments.
>
> Therefore, the ONLY knowledge that humans can have
>> about Nature is what those sensory effects are,
>
> OK
>
> and Science is the
>> premiere activity directed toward objectively acquiring that knowledge.
>
>> The knowledge is acquired by constructing precise sensory
>> instrumentation for measuring natural phenomena,
>
> Ok
>
> and by learning to
>> accurately predict the measurements.
>
>> All the other stuff that's contained in scientific models of Nature
>> (e.g., mathematics, causes, effects, space, time, particles, waves,
>> atoms, molecules, houses, trees, ...) is there merely to facilitate
>> thinking about and talking about the measurement predictions.
>
> That is reasonable in terms of the post 1920 philosophy as adopted by
> physics.
Actually, it's a necessary consequence of the /fact/ that all we can
know about Nature are the measurements we make of its phenomena.
What it attempts to do is to produce a mathematical model which
> accurately predicts the data.
What Science attempts to do is produce collections of accurate
measurement predictions - the use of mathematics (for concisely
organizing the predictions) isn't essential.
What is missing is the use of the human
> intellect to interpret what the maths is describing.
Interpretations aren't missing - ALL scientific theories to-date have
at least one ontological interpretation (i.e., a defined environment
containing defined entities with defined properties which collectively
give rise to the theory's predictions).
But what do you think those ontological interpretations tell us about
Nature?
The matter-of-fact answer is that they tell us nothing more than the
measurement predictions themselves do. That's because Nature won't
confirm any aspect of the interpretation other than the measurement
predictions, and because ontological interpretations aren't unique.
The maths has
> become an end in itself rather than a means to an end. If you believe
> that human intellect is so unreliable in its judgement that you should
> ignore it entirely - despite the fact that that same intellect invented
> the maths on which you depend, and conceived of the instruments you use
> to measure, then that is fair enough.
>
Recognizing the limits of what can be known about Nature has nothing
whatsoever to do with any limitations of human intellect. Regardless
how cleverly any scientific theory is interpreted, there's simply no
way to confirm the correctness of any aspect of the interpretation
other than the measurement predictions.
> Not all of that data can be expressed in mathematical terms. I observe
> that life is the antithesis of death. One excludes the other so in the
> case of Schrodinger's cat - before the box is open the cat is either
> dead or alive and the only thing which changes when the box is opened is
> our knowledge.
Do you really think that the QM founders would have bypassed that
interpretation if it were consistent with the measurements they were
obtaining? It wasn't, so they developed an interpretation (the
Copenhagen Interpretation) which was consistent with their measurements.
As humans learn more about what Nature does, humans have to be willing
adjust their notions of what's sensible, because, ultimately, what's
sensible is nothing more than what Nature does.
Reason says that if the cat is alive then it was before
> the box is opened. If it is dead then by retrospective analysis
> (autopsy) one can to some extent determine how long it has been dead. If
> autopsy shows it has been dead at least half an hour then I would accept
> that as proof that it was dead before the box was opened.
The "reasoning" that leads /you/ to those conclusions is based on the
things /you/ know about the behavior of Nature, and the problem with
your "reasoning" is that you haven't incorporated the observed
behavior of Nature that's led (actually forced) others to reason
differently.
This may be
> inconvenient to mathematicians as it means that there is more than one
> way of interpreting the maths and the right way to interpret the maths
> depends on reason and intellect not on mathematics or measurement.
No, Kennaugh, and this is the main point you're missing. There is
always an /unlimited/ number of ways to interpret "the maths" (i.e.,
the measurement predictions), but there's simply /no/ way to decide
which of them is "right way".
The
> mathematicians do not wish to be restrained in that way so have adopted
> a philosophy which states that reality is beyond the human mind and must
> be ignored.
Where do you get this stuff?
Mathematicians don't determine how Science is done, and Science has no
"philosophy" that "states that reality is beyond the human mind".
Furthermore, since Science is about nothing other than reality, so it
certainly doesn't get ignored.
They have renamed reason "common sense" and sneer at it.
> Such concepts of reality must be ignored in favour of a unique
> interpretation of the maths i.e. that before the box is opened the cat
> is both alive and dead to suit the mathematician which is why the post
> 1920 philosophy was adopted.
>
You're still talking through your hat, Kennaugh (or is it Scott
Murray's hat).
There does happen to be a "unique" interpretation of "the maths",
namely the measurement prediction themselves. IOW, there is a unique
/phenomenological/ interpretation, however, there's no limit to the
number of /ontological/ interpretations of "the maths" that can be
created, and the correctness of each of them is entirely decided by
the correctness of the phenomenological interpretation (i.e.,
determined by the correctness of the measurement predictions).
> I would say that as there is no evidence that the cat is both alive and
> dead and as that state of affairs has never been observed in any other
> circumstance in the history of mankind
You can say that all you want, but it's not accurate. Observations
have been made that are consistent with the alive-dead superposition
interpretation and inconsistent with the one-or-the-other interpretation*.
* Other interpretations of QM have been developed where the cat is
either alive or dead (e.g., Many Worlds), but those still call for
radical alteration of pre-QM conceptions.
that it cannot be so and a
> philosophy which demands that it is is wrong. Prediction is not the be
> all and end all. There is also the question of getting it right. It is
> not the only aim of science generally. The theory of evolution is
> accepted because it explains the data and would be accepted on that
> basis even if it was not possible to predict what will happen in future.
"Explains the data" is exactly equivalent to "predicts the data",
where "the data" are measurable observations. Prediction in the
context of scientific modeling isn't limited to things that haven't
happened.
> Plate tectonics does not predict,
Of course it does. ALL scientific theories predict.
and is unlikely to predict in the
> future, when there will be an earthquake or an eruption.
The worth of scientific theories is determined by the accuracy of what
they do predict, not by what they don't predict.
Its aim is to
> understand the processes involved.
Where "understand" means /nothing/ more than "become able to
accurately predict".