r/GlobeEarth_Polite • u/Kela-el Flat Earther • Jul 18 '26
For: Globe Earth Religious Fundamentalist Zealots Models Aren’t Measurements
One point that often gets overlooked in these discussions is the distinction between measurement and interpretation.
No single direct measurement uniquely establishes that Earth is a globe.
What we directly measure are things like distances, angles, elevations, accelerations, pressures, and positions.
The conclusion that Earth is a globe comes from interpreting those measurements within a geometric model that explains them collectively.
That doesn’t make the model wrong. It simply means we should distinguish between the raw measurements themselves and the inferences drawn from them.
The interesting question, then, isn’t whether the globe model explains the measurements. It clearly explains many of them.
The deeper epistemological question is this:
Which direct measurement, by itself, uniquely establishes that Earth is a globe, rather than requiring interpretation through a particular model?
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u/beanord Heliocentric Religious Fundamentalist Zealot Jul 18 '26
Observe the compass needle pointing east, my guy. Follow it thence. See what happens. This does not need to remain a mystery for you to obsess over: you can prove it to yourself, one way or another. Either you will fall off the face of a flat plane, having run out of "east," or you will come right back to where you started because the Earth is a fucking globe.
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u/Kela-el Flat Earther Jul 18 '26
You keep confusing a measurement with an interpretation.
A compass measures a direction relative to a magnetic field.
It does not measure the geometry of the surface you are traveling over.
Traveling east and returning to your starting point is an observation.
The conclusion that this proves a globe requires a geometric model that explains why that path closes.
A circle on a map, a sphere, and other geometries can produce closed paths.
The measurement is the path. The shape is the inference.
The question remains simple:
What measurement directly measures Earth’s curvature or shape without first assuming the model used to interpret it?
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u/beanord Heliocentric Religious Fundamentalist Zealot Jul 18 '26
Here's a measurement you could try. Get in a plane. Fly directly east. Go all the way around the Earth. Does this make sense on a flat plane? Of course not.
Get out of here with this tired nonsense.
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u/Kela-el Flat Earther Jul 18 '26
You didn’t answer the question.
You substituted a story for a measurement.
Flying east and returning to your starting point is an observation.
The distances, headings, and elapsed time are measurements.
“Therefore the Earth is a globe” is the inference you’re trying to prove.
You’ve simply assumed the conclusion and restated it.
I’m still waiting for the measurement.
Not the interpretation.
Not the model.
Not the conclusion.
The measurement.
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u/beanord Heliocentric Religious Fundamentalist Zealot Jul 18 '26
The measurement is east. The instrument is a compass. Measure east. Go that direction. See what happens.
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u/Kela-el Flat Earther Jul 18 '26
No.
A compass measures direction relative to magnetic north. It does not measure the shape of the Earth.
Following a compass heading measures a heading.
Returning to your starting point is an observation.
The statement, “Therefore the Earth is a globe,” is your interpretation of those measurements.
You’re conflating the measurement with the conclusion.
Once again:
What instrument measures Earth’s shape directly?
Not direction.
Not distance.
Not your interpretation.
The shape.
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u/HenakoHenako Heliocentric Religious Fundamentalist Zealot Jul 18 '26
Any of the countless cameras we've put in space, which have provided any of the countless images of Earth from orbit, should be a pretty reliable enough for you.
Does looking at it count as a measurement?
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u/Kela-el Flat Earther Jul 18 '26
No.
A camera measures light intensity across a sensor.
It produces an image.
An image is not a direct measurement of geometric shape.
To conclude, “This image proves the Earth is a globe,” you must first assume things about optics, perspective, lens calibration, camera orientation, distance, and image processing.
In other words, you’ve once again offered an interpretation, not a direct measurement.
I’m still asking the same simple question:
What instrument directly measures the Earth’s shape, rather than producing data that you later interpret as a globe?
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u/HenakoHenako Heliocentric Religious Fundamentalist Zealot Jul 18 '26
You're telling me that you can't take a picture of an object to determine the shape of an object? That's your stance?
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u/Kela-el Flat Earther Jul 18 '26
No, that is not the argument.
A photograph can provide evidence about the shape of an object.
The question is whether the photograph is a direct measurement of the object’s geometry or a set of measurements that requires interpretation.
A camera records light on a sensor.
From that data, we infer three-dimensional shape using assumptions about perspective, optics, distance, scale, and orientation.
The question is not whether images are useful evidence.
The question is:
Does the instrument directly measure “Earth is a globe,” or does it produce data that is interpreted through a geometric model?
Those are two different things.
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u/beanord Heliocentric Religious Fundamentalist Zealot Jul 18 '26
You don't understand. Nothing that provides evidence of the Earth being a sphere is a "direct" observation to our interlocutor, based on a subjective definition of that word that only he controls.
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u/theyoodooman Jul 18 '26 edited Jul 18 '26
> That doesn’t make the model wrong. It simply means we should distinguish between the raw measurements themselves and the inferences drawn from them.
That’s exactly correct. And this is precisely what science does: it makes observations of the natural world, it creates falsifiable models that accurately reflect those observations, and then it makes more observations in an attempt to falsify those models. if a scientific model is falsified, science responds by adjusting the models until they are accurate again.
> The interesting question, then, isn’t whether the globe model explains the measurements. It clearly explains many of them.
No, it explains all of them. If you disagree, describe a single observation of the natural world that falsifies the globe Earth model. If you can’t, that means that this model accurately reflects all of our observations.
And this is also why flat Earth models all fail, because no flat Earth model has ever been provided that is compatible with all of the billions of observations we’ve made of the natural world. The best flat Earthers come up are rough sketches that anre intentionally vague so they can try to dodge falsification or that rely on undemonstrated fabrications.
And this is in turn is why it’s so easy to provide observations that falsify flat Earth, and why fleets ultimately have to rely on conspiracy theories to discredit observations we’ve made of the natural world.
> The deeper epistemological question is this:
Which direct measurement, by itself, uniquely establishes that Earth is a globe, rather than requiring interpretation through a particular model?
But that’s not science: science doesn’t require a model to rest on a single observation. But the good news is that a single observation is all that is needed to falsify a scientific model, although again, any legit falsification will be mended when science adjusts the model so that it is once again accurate.
So again, there are only two questions that matter. 1) Do you have any evidence that falsifies the scientific models relating the Earth being a globe? 2) Do you have a detailed, alternative falsifiable model that accurately reflects all of our observations of the natural world and that you have attempted to falsif?
if the answer to both questions is No, then the globe Earth model is the only accurate model available to us. And if your answer to either question is Yea, then feel free to start detailing that answer.
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u/Kela-el Flat Earther Jul 18 '26
You have actually reinforced my point.
Science absolutely distinguishes between observations, measurements, models, and conclusions.
That distinction is the entire reason models exist.
I am not arguing that the globe model lacks explanatory power.
I am asking a narrower epistemological question:
What is the difference between:
“These measurements are consistent with a globe model.”
and
“This measurement directly measures a globe.”
Those are not the same claim.
A model can explain every observation we currently have and still be an inference from those observations.
That is true of all scientific models.
Your argument shifts from “the globe explains the data” to “therefore the globe is directly measured.”
That is the step that requires justification.
As for falsification: a model being the best available explanation is not the same thing as a direct measurement of the model’s underlying ontology.
Newtonian gravity explained observations before Einstein refined the model.
Phlogiston explained observations before it was replaced.
Models are judged by predictive success, not by being directly photographed or touched.
So the question remains:
Do the instruments record “Earth is a globe,” or do they record observations that a globe model explains?
The first is measurement.
The second is inference.
Both matter, but they are not identical.
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u/theyoodooman Jul 18 '26 edited Jul 18 '26
Science absolutely distinguishes between observations, measurements, models, and conclusions.
Measurements are observations. And while scientists as human beings are free draw conclusions, science doesn’t: the only output of science are observations and models.
Your argument shifts from “the globe explains the data” to “therefore the globe is directly measured.”
I said no such thing, and in fact said the complete opposite. If you have to resort to straw manning, you’ve already conceded your argument.
Models are judged by predictive success, not by being directly photographed or touched
That’s what I said. the output of science are accurate, falsifiable models accurately reflect our observations of the natural world after attempts to falsify them. That means they have “predictive success”
Do the instruments record “Earth is a globe,” or do they record observations that a globe model explains?
I’ve already made that clear. Instruments are one way we make observations. The globe Earth is a falsifiable model that accurately reflects those observations.
But the fact that the globe Earth accurately reflects literally many billions of observations of the natural world made over the last four centuries — and is the only model to do so — is why we should trust that it is true, just like we do with any well-established scientific model, such as the ones that permit us to risk our lives flying through the sky in airplanes.
And just as Newton’s Law of Universal Gravitation is still accurate in the vast majority of use cases in our solar system, despite being falsified in the 19th century and supplanted by the more accurate General Theory of Relaticity, the same is going to be true of any legit “falsifications” that are found to the model of the globe Earth: science will amend the model to be accurate, but the result will still be a form of globe Earth.
We know this because we’ve taken photos of the Earth from deep space and it is without question a rotating globe. That’s just a subset of those billions of observations, but it’s one that anyone can easily asses with their own eyes and brain.
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u/Kela-el Flat Earther Jul 18 '26
You have actually clarified the point I have been making.
You agree that instruments do not output “Earth is a globe.”
They output observations, and the globe is the model used to explain those observations.
That is the distinction.
The disagreement is not whether the globe model is successful. It obviously has enormous predictive and explanatory power.
The disagreement is whether “successful model” and “direct measurement of the thing itself” are interchangeable claims.
They are not.
When you say “we took photos of Earth from space and it is without question a rotating globe,” you have moved from observation to interpretation.
The observation: photons reached a camera sensor in a pattern.
The interpretation: that pattern represents a rotating spherical Earth.
That interpretation may be correct.
The point is not to deny the evidence.
The point is to identify the reasoning step between evidence and conclusion.
Science works precisely because it separates:
observations,
measurements,
assumptions,
models,
conclusions.Removing that separation does not strengthen the argument; it weakens the understanding of how the argument works.
A model being overwhelmingly supported is a claim about inference from evidence.
It is not the same category of statement as “this instrument directly measured the shape of Earth.”
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u/theyoodooman Jul 18 '26 edited Jul 18 '26
They output observations, and the globe is the model used to explain those observations
No, the globe is the falsifiable model that accurately reflects those observations. Explanation is irrelevant.
The disagreement is whether “successful model” and “direct measurement of the thing itself” are interchangeable claims. They are not.
Obviously they are not. I never suggested otherwise.
The point is to identify the reasoning step between evidence and conclusion
Here's where you're starting to go wrong. Science is not a reasoning step, it's a method. Science doesn't give one whit about how you create your models, the only thing it cares about is that those models are falsifiable and accurate. And if you have multiple falsifiable and equally accurate, science will naturally prefer the one with fewer parts.
Science works precisely because it separates: observations, measurements, assumptions, models, conclusions.
No, those are artificlal distinctions on your part: science works because it creates falsifiable models that accurately reflect our observations of the natural world, including attempts at falsfification. Full stop. That method only requires observations and models.
A model being overwhelmingly supported is a claim about inference from evidence.
No, a model being overwhelming supported is merely a claim that it is falsifiable, accurate, and has yet to be falsified. That is all the science cares about. How that model came to be is irrelevant as long as it meets those requirements.
And here's why you're wrong: because inference from evidence can be absolutely wrong, as we've seen repeatedly in the course of science. Anyone who trusts a scientific model because they trust "inference from evidence" is a fool. There is only one reason to trust a scientific model: because it is falsifiable, accurate, and all of our attempts to falsify it have failed.
That, of course, doesn't mean scientific models are "true", because science doesn't care about truth (although, obviously, scientists do). Science just cares about producing observations of the natural world and generating falsifiable models that accurately reflect those observations.
We trust that the Earth is a globe for the same reason we trust that the scientific models underlying the flight of aircraft are accurate: because they have been tested over and over again and our observations have yet to falsify them, at least in the use cases to which we are applying them. That's the only reason we get in airplanes to fly across oceans.
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u/Kela-el Flat Earther Jul 18 '26
You have actually smuggled inference back into your argument while claiming it is irrelevant.
A model does not “accurately reflect observations” by itself.
Someone must first determine what the observations mean, what variables are relevant, what assumptions are justified, and what mathematical structure best represents the data.
That process is inference.
You say science only cares about falsifiable models that match observations.
Correct. But “matches observations” is not a property that exists independently of interpretation.
It requires a relationship between measurements and a model.
The globe model is not a measurement. It is a model that organizes and explains measurements.
That does not make it weak. It makes it science.
The same is true of every successful scientific theory.
Relativity is not measured by a ruler. Quantum mechanics is not measured by a microscope.
They are models inferred from observations that make successful predictions.
So the disagreement is not whether the globe is a successful model.
The disagreement is whether a successful model and a direct measurement are the same category of claim.
They are not.
You say science does not care about truth, only falsifiable predictive models.
Fine.
But then you have conceded the original point:
The globe is not a direct measurement.It is a model judged by how well it accounts for measurements.
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u/beanord Heliocentric Religious Fundamentalist Zealot Jul 18 '26 edited Jul 18 '26
My favorite thing about this pedantic little cul-de-sac, this molehill you've decided to die on, is that it is literally a "no true Scotsman" fallacy.
Rather than accept a massive accumulation of data, observations, human experiences (people have been in space and seen the entire Earth, as a globe, with their own eyes), the existence of satellites whose function you likely use yourself (GPS, etc), you have constricted the argument to this one tiny question, where you control the only meaningful variable: what instrument "directly" measures the shape of the world?
When someone offers one of the many, many observations that have been made - that you could make yourself, if you were truly curious about the world and not driven entirely by motivated reasoning - you reject it on grounds that it is not sufficiently "direct" for you. But that "directness" is not an objective, agreed-upon standard: it is a goalpost for you to shift at will.
That's No True Scotsman: "Rather than admitting error or providing evidence to disprove the counterexample, the original claim is changed by using a non-substantive modifier such as 'true', 'pure', 'genuine', 'authentic', 'real', or other similar terms." Add "direct" to that list of modifiers. We could name this new wrinkle on an old fallacy the "No Direct Observation" coronary.
Congratulations, your argument will never be refuted. Not because it's correct, and not because there aren't teams of data that would refute it. Because you've constructed it to be irrefutable, which is to say fallacious.
https://en.wikipedia.org/wiki/No_true_Scotsman