I never said I understood it. I said that what I understand of quantum mechanics (which I admit is very little) is that it is still quite predictable, even if we understand the WHAT and not much of the WHY.
Only on microscopic scales. Or are you suggesting that the moon didn't exist until there was someone to observe it?
But does this experiment mean that it's possible for one person to think that I am a Human Being, and another person to see me as a 10 meter cube of solid tungsten?
I'm not familiar with that, can you provide more detail about how it applies to this discussion?
On the first point I indicated that nobody claims to rationalise QM - I was also pointing at me- so there are many different views.
Because the “ what “ is only defined in bulk statistics. I can say with reasonable certainty the outcome with many electrons.
The problem comes with tracing the history of just one, and in classical objective physics the results don’t make sense. Nobody can say what or how. Experiments have confirmed that not only is the state unknown it is actually undefined. The state does not exist till observed. Observation is what crystallises the state.
All this is complicated so I can only give a broad brush:
In double slit , two possible path experiments that recombine at the end , observation of one of the paths results in a different outcome after recombining pathd from that which would be observed after recombination if the observation had not been made. It’s crazy but it’s true.
Wigners friend is more complicated. It is the paradox of an observer observed, if our only knowledge is observation of the observer who communicates the state not the underlying state itself, . And what is the state between the observation and the observation of the observer to determine what the observer saw?
Does the observation of the observer yield a second crystallisation which can be in a different state to the first or can it only echo the first?
To cut a long story short, ( and this is an approximation to make it sound easy) an experiment conducted with six photons concluded the “observer of an observer” can come to a different conclusion of the state to the “ observer” , So in that in that sense reality is subjective Observers influence outcome which can differs between observers. Since a bomb destroying the world can be triggered from an observation of one particle, the idea that this is only a problem for small things does not work!
if you want to go further try either “ quantum reality” bagot , or “ through two doors at once” to explain the experiments that don’t make sense.
As for what I believe? I have said it many times.
All this wonderful maths is a game that produces useful models of a fundamentally unknowable universe ( I’m in good company with unknowable , many quantum physicists think the same, so do many philosophers)
Gravity is a useful example to illustrate the philosophical status of the model: It’s just a name we give to a pattern that mostly works. It doesn’t underpin the universe, or explain it, it’s just an observation of it. No one can explain what it is, only what normally happens.
I’m with Einstein and Bohm thinking the model of QM is incomplete. So there needs to be a better model but it has so far defied all the best minds, the results don’t make sense, so modelling is a problem.
So For me , the moon does exist , whether I look at it or not. If the maths of the model differs or looks screwy at times , or the underlying phenomena seem to make that questionable , who cares? , it’s because it’s only a model and observations not the universe itself.
I think Next century model will be unrecognisable from this.
Not least because I think consciousness is not a process of the brain.
The mind controls the brain, and consciousness does interact with the universe and other consciousness in a non local manner , so the observer does influence the observed. The consciousness is not visible either and non local ( in physics sense)
I know I will be ridiculed for my thoughts.
I take heart that “young “ who proposed the wave model of light was utterly ridiculed in his time by senior physicists of the day and followers of newton who believed it was a particle and said of young:
“contains nothing which deserves the name, either of experiment or discovery, and… is destitute of merit…. We wish to raise our voice against innovations, that can have no other effect than to check the progress of science, and renew all those phantoms of the imagination that Newton put to flight”
Pretty much what they say about people who think consciousness can be out of body. Sabom. Van lommel. Bellg. The list is long. But you will be surprised how many now believe it as a matter of medical experience, not faith. If you want to read up on that, try pim van lommel.
And with the acceptance consciousness is separate from body - the entire basis of life as a product of chemistry , and dawkinsian and Darwinian beliefs die the same day. That’s why materialists will fight tooth and claw to prevent that conclusion. They can no longer explain life. Awkward for atheists,
well you did ask…. So I answered.
The moon exists. Or something exists we perceive as the moon.
There is a soul and a body, but the consciousness needs the body to interact, but not to observe. You are being watched!
The science is squiffy.
The universe is unknowable.