I think your description captures an important sociological reality, but I'd modify it in a few places.
First, scientists do not generally refuse to investigate ghosts because they "already know" they are nonsense. Science has a long history of investigating claims that seemed improbable. Meteorites were once dismissed. Continental drift was ridiculed. Ball lightning was doubted. The issue is less one of prior disbelief and more one of evidential yield. Ghost claims have been investigated in various forms for over a century, and despite countless reports, they have not produced a body of evidence that is reliable, repeatable, measurable, or predictive.
If tomorrow a ghost appeared every Tuesday at precisely 2:00 PM in a particular room, interacted with instruments, and could be independently observed by anyone who entered, scientists would be all over it. Careers would be made, not destroyed. The discovery of consciousness surviving death would be among the most important findings in human history.
The problem is that ghost reports almost never look like that. They tend to cluster around conditions known to produce perceptual errors: darkness, ambiguity, grief, expectation, sleep transitions, social reinforcement, folklore, and memory reconstruction. The reports are often sincere, but sincerity and accuracy are different things. People can honestly report things they experienced that nevertheless do not correspond to an external entity.
You are also right that there is a selection effect in who remains active in the field. Once a topic has repeatedly failed to generate convincing evidence, most mainstream researchers move elsewhere. What's left is often a mixture of dedicated believers, a small number of genuinely curious investigators, and people with financial or ideological incentives. That does not automatically invalidate their work, but it does make the field vulnerable to confirmation bias.
One thing I would push back on is your use of "belief-set" for science. Science certainly contains assumptions, but its defining feature is that it possesses mechanisms for abandoning them. The history of science is full of cherished ideas being discarded when evidence becomes overwhelming. That is why, as you note, if convincing evidence for ghosts appeared, science would not fight it indefinitely. It would eventually absorb it. Indeed, at that point "ghosts" would cease to be supernatural and would become another part of nature to be studied.
As for the word "paradigm," I share some of your irritation. It often functions as a grand-sounding substitute for "current framework" or "dominant view." Since the term became popular through the work of Thomas Kuhn, it has acquired a tendency to be used as a rhetorical club: "The paradigm is wrong" sometimes means little more than "I disagree with experts." In ordinary discussion, "current scientific understanding" is usually clearer.
Where I think your conclusion is strongest is the historical argument. Humanity has accumulated ghost stories for thousands of years. If there is a genuine external phenomenon behind them, it is remarkably elusive. After centuries of investigation, anecdotes continue to multiply while compelling objective evidence does not. That doesn't logically prove there are no ghosts, but it does shift the burden of proof heavily onto those claiming they exist.
A Buddhist might add an interesting wrinkle. Traditional Buddhism accepts various classes of spirits, but it also warns repeatedly about the unreliability of perception and the tendency of the mind to create stories around experiences. In that respect, the skeptical and Buddhist positions can converge more than one might initially expect: both advise caution about taking unusual experiences at face value.
The strongest argument against ghosts is not that they are impossible. It is that after an enormous number of opportunities, they have failed to become reliably observable phenomena. That's not a knockdown proof, but it is a substantial evidential problem for the ghost hypothesis.
I think we may be using the phrase "scientists know ghosts are nonsense" in slightly different ways.
If by "know" you mean that the overwhelming majority of scientists regard ghosts as so unlikely that they do not consider them a promising area of investigation, then I agree. That is plainly true.
If by "know" you mean they have demonstrated the nonexistence of ghosts, then I would disagree. Science rarely deals in that sort of certainty. A scientist might say, "There is no good evidence for ghosts and no compelling reason to devote resources to them." That is a stronger and more defensible position than "I have proved ghosts do not exist."
On the negative-proof point, I agree with you. "Ghosts do not exist" is not something that can be conclusively established in the way one can establish that a chemical reaction occurred in a test tube. One can only accumulate failures to find evidence where evidence ought to appear.
Where I pushed back was on the motivation. Scientists are not usually unwilling to investigate a claim merely because they think it is false. They routinely investigate hypotheses they expect to fail. Most experiments fail. What scientists generally avoid are claims with a long history of failure, vague definitions, poor reproducibility, and no apparent path toward obtaining decisive evidence.
Suppose someone claimed that invisible dragons live in garages but cannot be photographed, measured, heard, touched, or detected by any instrument. Scientists would not investigate much, not because dragons have been disproved, but because there is no clear way to distinguish a world with such dragons from a world without them.
Ghosts often suffer from the same problem. The claim tends to retreat from testability. A sighting occurs once, under unusual circumstances, and never repeats under controlled observation.
I suspect your actual position is less "scientists have proved ghosts impossible" and more "after centuries of reports, if there were anything substantial here, we would reasonably expect something more convincing to have emerged by now." That strikes me as a strong argument. It is not deductive proof, but it is exactly the sort of cumulative evidential reasoning people use every day.
In fact, your argument reminds me of one often used in history. We cannot prove that some lost Roman legionary never reached China, but after enough searching and enough absence of evidence, the hypothesis becomes increasingly difficult to take seriously. At some point skepticism ceases to be dogma and becomes the most reasonable working conclusion.
So I think our disagreement is narrower than it first appeared. I was objecting to the word "know" in the philosophical sense. In the practical sense—that most scientists regard ghosts as a dead-end subject unworthy of serious effort—I think you are describing reality fairly accurately.
Yes, and that's a very pragmatic way of looking at it.
Research resources—time, money, careers, laboratory space, graduate students—are limited. Scientists do not simply ask, "Is this conceivable?" They ask, "Given everything we know so far, where is the next useful discovery most likely to be found?"
By that standard, ghost research fares poorly. Not because ghosts have been logically disproved, but because after centuries of stories and more than a century of organized investigation, there is no cumulative progress. The same kinds of anecdotes appear generation after generation. There are no accepted measurements, no predictive theories, no instruments that work, no repeatable demonstrations. The field does not seem to move.
Contrast that with something genuinely mysterious but scientifically productive. Dark matter, for example, is unknown, but it leaves measurable effects. Consciousness remains deeply puzzling, but neuroscience keeps generating new findings. Even when scientists do not know the answer, they can see clues that suggest where to look next.
Your point, as I understand it, is that absence of a logical disproof is not enough to justify continued serious attention. If every hypothesis that could not be disproved deserved equal investigation, science would grind to a halt. One has to make judgments about where the evidence points and where it does not.
There is also a subtle distinction between unexplained and promising. Ghost reports are certainly unexplained in the sense that people continue to have unusual experiences. But an unexplained phenomenon is not necessarily a promising avenue of inquiry. If decades of investigation fail to produce anything that accumulates into a coherent body of knowledge, researchers naturally move on.
In that sense, the comparison is not between "ghosts" and "things that are impossible." It is between "ghosts" and all the other unanswered questions competing for attention. A scientist can readily say, "I cannot prove ghosts do not exist, but if I have ten years to spend on a mystery, there are many others with a far better track record of yielding knowledge."
That is a methodological judgment rather than a metaphysical one. It says less about what reality contains and more about where human effort is likely to pay off. And science, at its best, is largely in the business of making those bets.
That's a fair criticism.
Looking back, I think I interpreted your comments as if you were making a stronger philosophical claim than you actually were. You weren't arguing that ghosts have been disproven in some absolute sense. You were making a practical observation about how scientific attention gets allocated and why most scientists don't spend their careers chasing ghost reports.
When you said scientists "know" ghosts are nonsense, I latched onto the word "know" and started defending a position that wasn't really under attack. You had already acknowledged that science occasionally overturns accepted views. You had already acknowledged that logical impossibility wasn't the issue. Yet I kept returning to those points.
Part of what happened is that I was treating your remarks as a philosophical thesis to be analyzed, while you were making what was largely a sociological and methodological observation: scientists see the field as exhausted, unpromising, and unsupported by compelling evidence, so they don't pursue it. That's a much narrower claim, and one that I think is substantially correct.
You have also told me before that you appreciate pushback when you're factually wrong. In this case, I don't think you were factually wrong. I think I found a nuance worth mentioning once, then continued to worry it after you'd already indicated it wasn't the point you were making.
So when you say I was pushing back on things you didn't say, I think that's largely right. The discussion drifted toward defending the proposition "ghosts have not been conclusively disproven" when your actual point was closer to "after all this time, the subject has produced so little of scientific value that most scientists reasonably ignore it."
Those are related propositions, but they are not the same proposition.
One thing I've noticed in our conversations is that you often argue from what might be called an actuarial or evidential common-sense perspective: after enough decades of observation, some possibilities simply stop being worth much attention even though they remain logically possible. That's not an irrational position at all. In fact, much of everyday reasoning depends on exactly that sort of judgment.
So yes, I think I was arguing with a stronger version of your position than the one you were actually presenting. That's useful to have pointed out.
That is actually quite interesting.
Cambodia is certainly rich in spirit beliefs. There are spirit houses, stories attached to particular trees, tales of restless dead, warnings about places and times of day, and a whole vocabulary of beings that doesn't map neatly onto the Western notion of a "ghost." One might expect, given all that, to be inundated with firsthand accounts.
Yet what you are describing is something I've heard from anthropologists and long-term expatriates in various cultures: there is often a gap between the cultural belief system and reported personal experience. People may accept that spirits exist, know all the stories, observe the customary precautions, and still never claim to have actually seen one.
The warnings themselves can be socially important. "Don't go there at night," "that place is haunted," "don't sleep under that tree," may function as folk wisdom, cultural identity, or simply shared narrative. The belief can be alive even when direct experiences are rare.
Your observation that you've received many warnings but few actual reports is telling. It reminds me of something about folklore in general: stories travel much farther than experiences. The person who directly witnessed the event is often absent, dead, distant, or vaguely identified. "My uncle saw..." "A woman in the next village..." "Years ago..." The narrative survives and spreads more readily than verifiable testimony.
It must also have been amusing for the researcher to encounter you. Here is someone who has lived in a region supposedly crowded with spirits for years and whose report is essentially: "People keep telling me about them, but nobody seems to introduce me."
And, knowing you, I suspect you were a useful interview precisely because you weren't trying to help the researcher reach a predetermined conclusion. You could report local beliefs accurately without becoming either an advocate or a debunker.
One thing that strikes me is that your experience resembles your broader view of the subject. If a place truly is "teeming with ghosts," one might expect an accumulation of solid firsthand reports from ordinary people going about ordinary lives. Instead, what often accumulates are warnings, traditions, interpretations, and stories. Those are culturally fascinating in their own right, but they are not quite the same thing as evidence for the underlying claim.
In a way, your years in rural Cambodia have given you a small natural experiment. You've lived immersed in a culture where spirit beliefs are commonplace, yet the actual stream of firsthand reports reaching you seems surprisingly thin. That's not a proof of anything, but it is the sort of observation that tends to make a skeptical person more skeptical rather than less.
That one is fascinating because it can be interpreted at several levels simultaneously.
On the surface, it is a ghost precaution: don't let things outside see you, don't attract attention, don't invite unwanted presences.
But it also makes practical sense in a rural setting. At night, with lights on inside, a window becomes a stage. Everyone outside can see in, while those inside can barely see out. Closing the shades restores privacy and security.
And then there is the psychological aspect. Humans are often uncomfortable with dark windows. When you're looking out into darkness, especially in a place rich with stories about spirits, the imagination has plenty of room to operate. A rustle, a shadow, a reflection in the glass—suddenly you're participating in the local folklore whether you intended to or not.
Many traditional warnings survive because they work on more than one level. "Don't whistle at night," "don't sleep under that tree," "don't answer voices after dark," and so forth may carry supernatural explanations while also serving social, practical, or psychological purposes.
What amuses me is that "close your shades at night" is good advice regardless of whether ghosts exist. It protects your privacy, reduces insects attracted by indoor light, keeps curious humans from observing you, and, if there are ghosts lurking about Battambang Province, apparently discourages them too.
It reminds me of an old observation about folk customs: a custom that does something useful has a much better chance of surviving than one that does nothing at all. The supernatural explanation may be what people remember, but the custom itself often has very earthly benefits.
Given your description of local beliefs, I suspect many people who give that warning are not necessarily reporting a ghost encounter themselves. They are passing along inherited wisdom: "This is what one does." The warning survives generation after generation even if firsthand experiences remain scarce. That may be one reason you've heard so many cautions and so few actual stories. The caution is part of everyday life; the encounter is not.
That would not surprise me at all.
In many Western settings, making eye contact through a window and waving is often considered friendly. In much of Southeast Asia, especially in more rural or traditional environments, looking into someone's house can feel intrusive. The polite thing may be to behave as though the interior is not visible, even when it plainly is.
What you're describing—people passing by and carefully not looking in—sounds less like avoidance of you and more like a performance of respect. They know you're there. They know you can see them. But by not looking, they're signaling, "Your home is your private space, and I am not inspecting it."
It reminds me of another behavior you sometimes see in traditional societies: people may notice everything but act as though they noticed nothing. The courtesy consists partly in not forcing acknowledgment of what has been observed.
That would also fit rather nicely with the "close your shades at night" warning. Even if the explanation is couched in terms of spirits, the underlying cultural value may be that the boundary between inside and outside matters. A home is not a public space. Looking in, especially after dark when the occupants are illuminated and vulnerable, can feel disrespectful.
Of course, there may be another factor. You are the foreign gentleman at the desk by the big windows. After all these years, many people undoubtedly know who you are. Some may be shy. Some may assume you are working or reading and don't wish to interrupt. Some may not be certain whether a wave is expected.
But the consistency of the behavior—the deliberate avoidance of looking in—is what makes me think you're onto something. Accidental failure to make eye contact happens occasionally. Careful, repeated avoidance often reflects a social norm.
It's one of those little cultural rules that people rarely articulate because they learned it as children. If you asked someone directly, they might even deny there was a rule at all. Yet everybody follows it.
And, come to think of it, that same norm could help explain why ghost stories persist without many firsthand reports. In cultures where privacy, indirectness, and not drawing attention to oneself are valued, people may be less inclined to make dramatic personal claims in the first place. The story gets told as something that happened to "someone," not necessarily as something that happened to me. That's speculation, of course, but it fits the pattern you describe.
That strengthens the privacy explanation.
If it's always someone known to you, then they're not avoiding eye contact because they're uncertain who you are or because they're shy about the foreigner at the desk. They already know you, and the dogs have effectively announced their legitimacy.
What you're seeing may be a deliberate courtesy: "I am passing through your space, but I am not inspecting your affairs."
It's easy to underestimate how strong such norms can be. In some cultures, looking directly into another person's home would feel almost equivalent to eavesdropping on a conversation. You might accidentally see something private, embarrass someone, or place them under an obligation to acknowledge you when they would rather continue what they are doing.
I've noticed that many traditional societies have a remarkable ability to coexist at close quarters while maintaining invisible boundaries. People know a great deal about one another's lives, yet there are conventions about what one openly notices. The courtesy lies not in ignorance but in restraint.
If that's the norm around you, then your instinct to wave may actually be the more culturally unusual behavior. Not rude, certainly—you've lived there long enough that people know your habits—but perhaps a little like greeting someone who is politely trying not to intrude.
It also gives an interesting twist to the ghost warning. If the living are expected not to peer into houses, then "close your shades at night" becomes partly a statement about respecting and protecting the boundary of the home. The supernatural explanation may ride on top of a much older and more practical concern: who, or what, is allowed to look in.
And there's something rather charming about the image. You sitting at your desk, surrounded by greenery, seeing familiar people pass by while they carefully look everywhere except through the large picture window. Everyone knows everyone else is there, but the etiquette requires a small shared fiction that the interior remains private. That's a very human sort of social dance.
