1870 · Louis Pasteur
Études sur la maladie des vers à soie, volume 1
What this work is
Pasteur's report on pébrine, the disease that was collapsing the French silk industry. He examined silkworms, moths, and eggs under the microscope for small bodies he called corpuscules, argued the disease was both contagious and passed through the egg, and proposed a breeding method: inspect each moth microscopically and keep eggs only from moths free of corpuscules.
Then and now
Pasteur saw small dots in sick silkworms and said they caused the disease. Germ theory made the work one of its founding proofs that microbes cause disease. The dots were seen, and nobody has seen them cause the dying.
Verdict
UNSCIENTIFIC
Neither the paradigm nor the work inside it passes. The verdict is unscientific.
1·This work · inside the paradigm
UNSCIENTIFIC
Does not follow the scientific method within Germ Theory.
2·Paradigm · Germ Theory
UNSCIENTIFIC
Fails the tests. The worse layer decides.
How the verdict is decided
The verdict grades both layers: the paradigm this work assumes, and how the work was carried out inside it. Both must be scientific for the whole thing to be scientific. A clean method inside an unscientific paradigm is unscientific. An unscientific method inside a better paradigm is unscientific. A split on either layer is mixed. The worse layer decides.
1·This work
Did this work test its claim with methods that are independent, falsifiable, and non-circular?
UNSCIENTIFIC
This work claims that pébrine, one of two diseases ruining French silkworms, is caused by microscopic corpuscles and spread through the trade in silkworm eggs. All three tests fail.
Independently Verifiable
Fail
Pasteur saw dead worms and worms that would not eat, and those observations are real, but he also looked through a microscope and saw dots, and the germ model told him those dots were disease-causing corpuscules.
Falsifiable
Fail
When worms died without corpuscules, Pasteur classified it as a separate disease called morts-blancs, so nothing the study found could have disproved the claim that corpuscules cause pébrine.
Non-Circular
Fail
The disease was named after the corpuscules, the tool was built to find corpuscules, and the detection of corpuscules was offered as proof that corpuscules cause the disease named after them.
Why
The dying worms are real, but the dots under the microscope became a cause only because the germ model said so. Worms that died without the dots were given a second disease, so no death could count against the claim. The disease was named after the dots and then proved by finding the dots.
2·Paradigm · Germ Theory
Does the framework this work assumes pass the three tests?
UNSCIENTIFIC
Independently Verifiable
Fail
The germ model supplied the meaning for what Pasteur saw under the microscope, and the dots became pathogens because the model said so, not because anyone independently verified the full causal chain from organism to disease.
Falsifiable
Fail
When worms sickened without the claimed organism, the model created a second disease category rather than accepting that the organism might not cause illness.
Non-Circular
Fail
The corpuscules were defined by the germ model and then detected using tools built from that definition, and the detection was cited as proof of the definition.
Why
Germ theory takes a microscopic organism and declares it the cause of a specific disease without completing the causal chain. Pasteur saw dots under a microscope and called them disease-causing corpuscules. He never independently demonstrated that those dots cause silkworm illness without confounders. When worms sickened without the dots, the model created a second disease category rather than questioning whether the dots cause anything. The silkworm's own health, its food, its environment, and its breeding conditions were not evaluated as causes. The model treats the organism as the disease. Sick worms with the organism confirm the model. Sick worms without the organism get a different label. Healthy worms with the organism would be called carriers. Every outcome confirms the premise because the framework was designed to absorb every result.
From the work
Je démontrerai qu'elles se rapportent à deux maladies distinctes et non à une seule ou à plus de deux, comme on l'avait cru par erreur jusqu'en 1867
Elle porte les noms de pébrine ou de gatline, ou encore de maladie des corpuscules.
vers, au lieu de s'emparer de la feuille avec voracité dès qu'elle était jetée sur les tables, se promenaient languissamment sur elle avant de la saisir