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Physicists and Philosophers Debate the Boundaries of Science

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Re: Physicists and Philosophers Debate the Boundaries of Science

#161
post #42

Earlier quoted context omitted.

> Saying that is like saying "we don't know evolution is true, because we don't see new species evolve every day". We do see new species evolve every day. We also see microevolution so commonly that it's a standard high-school biology task. > Physics is funded because it's cool. The point being made is that for a long time, it was common for physicists to look down their nose at other sciences "because what we do is…

> We do see new species evolve every day. We also see microevolution so commonly that it's a standard high-school biology task. Can you describe? My memory of high school genetics involved experiments with Drosophila eye color, etc. which were really about the passing of genes and, sometimes, mutation. However these experiments didn't prove that natural selection or seemingly random mutation were necessarily what dro…

> Science, in part, requires faith.

Only at the bleeding edge, which you don't need to use in your everyday life. Most science-related things at human scale can be done with your own two hands; you don't require billion-dollar tools to fiddle with materials science, for example. Youtube is filled with videos of people doing human-scale science.

The whole 'science requires faith' argument is largely thrown out to give credence to religion. The problem with that argument is that the fundamental building blocks of science do not require faith, and you build from those. The SI units are convention - you can make your own. What constitutes validity is convention - you can decide your own way. You don't require faith to start doing basic science.

On the other hand, religion's basic building blocks require faith from the outset. Person X is divine, 'trust us'. God Y likes or doesn't like that, 'trust us'. And from these basic religious building blocks, whole edifices are built. For example, most catholics are unaware of how the bible was pieced together by committee. That information doesn't affect their day-to-day lives, however the religious rules that do affect them are based on those fundamental building blocks that are unverifiable by anyone. Faith is required because the foundational blocks are not verifiable at all.

This does not happen in science - you can verify the foundational rules yourself, and build as far along the tree as your interest and tooling allow. Theoretical physics existing in the 'faith' world is largely a canard - most science is not like this, and theoretical physics is at the exploratory edge of science, not at the core foundational blocks. In short, the Planck Length is defined by the meter which we can see and confirm; the meter is not defined by the Planck Length which we theorise about.

Not to mention that in general, 'scientific facts' are constantly tested, and 'religious facts' are not. The engineering capabilities of steel are in constant use in almost every part of our lives; if science was wrong about them, the material would fail in unexpected ways. The divinity of the christ figure... well, it isn't even testable. Christ is only divine to christians, but a steel bridge needs to hold up regardless of the mental state of the humans using it.

Re: Physicists and Philosophers Debate the Boundaries of Science

#162
post #161

Earlier quoted context omitted.

> We do see new species evolve every day. We also see microevolution so commonly that it's a standard high-school biology task. Can you describe? My memory of high school genetics involved experiments with Drosophila eye color, etc. which were really about the passing of genes and, sometimes, mutation. However these experiments didn't prove that natural selection or seemingly random mutation were necessarily what dro…

> Science, in part, requires faith. Only at the bleeding edge, which you don't need to use in your everyday life. Most science-related things at human scale can be done with your own two hands; you don't require billion-dollar tools to fiddle with materials science, for example. Youtube is filled with videos of people doing human-scale science. The whole 'science requires faith' argument is largely thrown out to give…

> Only at the bleeding edge, which you don't need to use in your everyday life.

He means how do you know the speed of light is 186,000 mi/sec? Did you test it yourself? Or are you taking someone's word for it? It's one or the other.

> On the other hand, religion's basic building blocks require faith from the outset.

I think you and the guy above you used the wrong word. Instead of faith, I would have used "trust". I trust that Einstein and his peers who studied his work are correct in their assessment of his theory of relativity. I don't need to test it myself, I take their word for it. I trust them.

On the other hand, people who compare something like string theory to philosophy really have it backwards. String theory might be untestable right this second due to technical limitations (string theory does make quite a few unique predictions) but that doesn't mean it will remain that way forever. Hell, it may not be that way tomorrow with as fast as science has been progressing... This is in contrast to proving the existence of a God or deity which has zero hope of ever being testable because it's "inherently" untestable.

As far as string theory goes, one of the most obvious predictions are strings themselves. We cannot build an accelerator large enough to smash particles together at the speeds required to look for strings but that doesn't mean such a thing is impossible; such an accelerator already exists - supermassive black holes. They accelerate particles at the required speeds to look for strings.

Re: Physicists and Philosophers Debate the Boundaries of Science

#163
post #161

Earlier quoted context omitted.

> Science, in part, requires faith. Only at the bleeding edge, which you don't need to use in your everyday life. Most science-related things at human scale can be done with your own two hands; you don't require billion-dollar tools to fiddle with materials science, for example. Youtube is filled with videos of people doing human-scale science. The whole 'science requires faith' argument is largely thrown out to give…

> Only at the bleeding edge, which you don't need to use in your everyday life. He means how do you know the speed of light is 186,000 mi/sec? Did you test it yourself? Or are you taking someone's word for it? It's one or the other. > On the other hand, religion's basic building blocks require faith from the outset. I think you and the guy above you used the wrong word. Instead of faith, I would have used "trust". I…

> He means how do you know the speed of light is 186,000 mi/sec? Did you test it yourself? Or are you taking someone's word for it? It's one or the other.

I take someone's word for it, but here's the kicker: I don't care. That particular measurement doesn't affect me one jot if it's a different speed. I don't play with optics; the measurement affects nothing I choose to do. However, if I did care, I could work from first principles and find out; it's really well documented, and I can also create my own methodology. This is not true of religious requirements. Throw money in the plate on Sunday because this guy two thousand years ago was divine? There is no way I can verify that.

> Instead of faith, I would have used "trust".

I did leave out a bit saying that the GP was using two different forms of 'faith' that were apples and oranges, but left it out as I was already waffling. :)

However, you will find that as you do your own science, it pretty much always conforms to the rules found by people who have come before you. It's really only as you near the expansion fringes of science that you start getting conflicts with mainstream thought.

Again, this does not happen with religion, where often the argument becomes "god moves in mysterious ways" or "who can know his plan, but he does have one". Core rules that don't make sense with the observed world are often distorted with these phrases. There are definitely grey areas and fuzziness in science - biology has a lot of fuzziness - but there are still common behaviours that work regardless of your cultural background. Born into an Egyptian Coptic family, Christ is divine. Born into the Muslim family next door, Christ is a prophet, but not divine. The fundamental essences of science just don't move with cultural background like that; the resistivity of copper doesn't care about your state of mind.

There is definitely trust involved in science, but trust is a thing that can be broken and reshaped and is allowed to be examined and verified, where faith is not. Besides, if trust is broken, that's considered a fault on the part of the person providing the information. However, if faith is broken, that's considered a fault on the part of the person receiving the information.

But word choice is important - by saying "science relies on faith", the underlying agenda is that other things that rely on faith should be given the same level of trust, even though they don't expose themselves to the same level of inspection.

Re: Physicists and Philosophers Debate the Boundaries of Science

#164
post #29

Earlier quoted context omitted.

I fully agree with your point, but I think the "picture of atoms" is not a good supporting argument. The IBM image[1] is nothing more than a visualization of measurements including a good measure of artistic license. It has not much to do with seeing in the usual sense. [1] http://researcher.watson.ibm.com/researcher/files/us-flinte/...

Every picture is a visualization of measurements.

Agreed, but looking at an artistic interpretation of an object is not seeing the original object.

You can take a picture of a car and you can see a car with your eyes. You can take measurements of an atom and visualise that measurements but you will never be able to see an atom.

To put it another way: Imagine you and me took a picture of a green car. In your picture the car is green, in mine the car turned out blue. Would you agree that your picture is more realistic than mine?

The color of the atoms in the IBM visualisation is purely artistic. You will never be able to say green atoms are more realistic than blue ones. I’d even go so far to say the same applies for radius and shape in the IBM visualisation.

“no one has ever seen an atom" and no one ever will, because atoms don't exist in the visual realm.

Re: Physicists and Philosophers Debate the Boundaries of Science

#165
post #29

Earlier quoted context omitted.

Every picture is a visualization of measurements.

Worse, by his definition of "see", one might as well say no one has ever seen the wind.

I guess my original comment was just lost in translation.

In my first language I think most people would agree that seeing involves visible light and eyes. We say the blind can't see, because their eyes don't work. We say that we can't see in the dark, because there is not light.

Sometimes we use see in a metaphorical sense, like "the blind see with their fingers". No one would confuse the fact that blind people gather some information about their surroundings with the help of their fingers with the fact that blind people just can't see. It's not the same thing.

I could agree that one can say "seeing" in regard to an atom in a purely metaphorical sense or poetical sense but that was not my interpretation of the original statement.

Maybe in English it's just different?

Re: Physicists and Philosophers Debate the Boundaries of Science

#166
post #37

Earlier quoted context omitted.

I fully agree with your point, but I think the "picture of atoms" is not a good supporting argument. The IBM image[1] is nothing more than a visualization of measurements including a good measure of artistic license. It has not much to do with seeing in the usual sense. [1] http://researcher.watson.ibm.com/researcher/files/us-flinte/...

People do take photographs of single atoms. It requires a very colorful atom and a very bright flash, but both those things exist. They're not particularly interesting photographs: atoms are smaller than a light wavelength and they look like dots. I've seen them before, although I couldn't find one in a minute of Googling. There are even movies, as described in this paper: http://dx.doi.org/10.1063/1.36788

Abstract:

   We demonstrated interruptions of macroscopic duration in 
   a single trapped and cooled Ba+ ions’s 493‐nm 
   fluorescence. They are caused by transitions of the ion 
   into the ‘‘dark’’ 2D5/2 state.—Multiple simultaneous 
   jumps of three ions indicate cooperative interaction 
   with the light.
I haven't read the paper but I'd be interested in a quote from the part that supports the statement: "People do take photographs of single atoms. It requires a very colorful atom and a very bright flash,..."

I'm not aware of a definition of atomic color but maybe that's a real thing in analytical chemistry, spectroscopy or some other field. I wouldn't be surprised.

Probably it's just the wavelength of the emitted light.

Re: Physicists and Philosophers Debate the Boundaries of Science

#167
post #79

Earlier quoted context omitted.

> BTW, is astrology actually falsifiable? I'm under impression that astrologists deliberately strive for unfalsifiability exactly to avoid falsification which could cast doubt on their wisdom. It is. Just do the following experiment: Find, say, ten persons and an (or many) astrologists and let them create a horoscope (say, either a prognosis for the future or description of character traits) for these 10 persons, whe…

Have you heard about the Forer Effect? Horoscopes are written to be convincing to gullible readers. http://skepdic.com/forer.html

Thanks for the link to the Forer effect.

Of course, if the proponents of astrology choose to present it in a non-falsifiable way, then it is not science from the get-go.

When astrology was conceived, it was actually respectable science, if that concept had existed then, and it led to the development of astronomy. If you can predict the flooding of the Nile by the rising of Sirius, what else might the heavens show you?

Re: Physicists and Philosophers Debate the Boundaries of Science

#168

Nowadays, as several philosophers at the workshop said, Popperian falsificationism has been supplanted by Bayesian confirmation theory, or Bayesianism, a modern framework based on the 18th-century probability theory of the English statistician and minister Thomas Bayes. Bayesianism allows for the fact that modern scientific theories typically make claims far beyond what can be directly observed — no one has ever seen…

Falsification has also the problem of unknown unknowns. Something that gave LENR or cold fusion this enormous. setback. They simply did not understand the loading ratio at that time.... A negative replication does not lead to dis-confirmation of a process, only that this particular atomic arrangement did not work.
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