But the idea of a ghost or spirit isn't a matter of a certain wavelength of light. It's an incorporeal existence, one (currently) not scientifically measurable or tangible, hence why clairvoyance is still considered theoretical, never ultimately proven nor disproven.
This is gibberish. You claim that ghosts are incorporeal... but that does not mean anything. Non existent things all classify as incorporeal, too.
You claim they can not (yet) be measured... but you have no evidence whatsoever to support the idea that there is anything TO measure.
We have a pretty good handle on physics these days... good enough to make the computer you are sitting at out of sand and clay... good enough to make pictures of the ionic charge of the water molecules in your body.
And, really, if you SEE, or FEEL, or HEAR something
external to yourself... then it made or reflected photons in the wavelengths you can see... stimulated your nerve endings in a manner you can feel... or made a sound that humans can hear...
And we can record all of those things in detail far superior to human perception...
With ZERO results.
Not finding evidence could mean you can not detect the evidence... but it could just as easily, and far more probably, mean that there
is no evidence.
This is the problem with 'believers'... they imagine their assumptions COUNT as meaningful. They actually think that a lack of evidence SUPPORTS their notions...
And Sorry, but, just like ghosts, clairvoyance has shown not one iota of evidence of being real.
Really- DARPA spent millions studying it.. and got exactly, precisely,
nothing.
Your notion that seeing them is all just a matter of delusion or external stimuli only goes to support that. When you hallucinate and take a photograph of your surroundings, other people aren't going to see your hallucination in the picture. It was all just in your head, not in the camera.
Pareidolia perfectly explains ALL actual ( as opposed to faked ) photographs and sound recordings that purport to show 'ghosts'... and it perfectly explains why people tend to mistake certain external stimuli for something else.
It also explains why people who do not believe in the survival of the soul do not see ghosts. They see OTHER things.
And monetary gain certainly explains why so many "ghost" images are faked... especially on these ridiculous ghost hunter shows... where they have been caught playing flashlights on walls and waving hands in doorways to try and create 'ethereal" images on their night vision cameras...
These folks get PAID to find ghosts... others get paid to write books or talk to the dead... all for something that has never been shown to be remotely credible.
SO what we have on the one hand is the pure invention of a whole afterlife world... with the pure invention of unprovable forces, undetectable objects, and impossible physics to explain away the lack of evidence for something ...
And on the other hand we have a well understood and
replicable mental phenomena that explains all observations AND the lack of supporting evidence for those observations. The same feature of mind that allow you to see faces in the random pattern of a stucco wall enables you to see figures, faces and forms where none exist....
Hmmm... that's a hard one... back the fantasy bullshit... or the replicable science....
If everybody only believed what had been proven, we'd still be in the stone age.
Guess what stone age people believed in? Ghosts, spritis, demons and Gods. Magic and witchcraft.
We are thousands of years and millions of experiments beyond the stone age... and thus far EVERY SINGLE SUPERNATURAL THING the stone agers believed, that has been tested, has been found to be false...or entirely insupportable.
...far better explanations discovered, for everything that was once magic... from lightening to sickness...
If we still believed in the unproven stone age idea that lightening was God's wrath... then you and I would be having this conversation thru two cans and a string.
All human accomplishment since the stone age has been rooted in discounting every explanation that offered no replicable proof.
How do we build a building? Well we certainly DON'T do it the way that fell down... we copy the technique that stood up... the PROVEN technique.
Science, and I, are both open to new ideas... and new explanations...
All you have to do is prove them.
Demonstrate that the thing you claim exists does exist... OR- come up with a theoretical framework explaining how it COULD exist.
One theory of the supernatural that would enable scientists to make an observation of an event predicted by the theory.
Again... we see exactly the evidence we should expect to see if there are NO ghosts... but money can be made in fooling people that there are.
Just like UFOs and conspiracy theories.