For most of the twentieth century the stress-and-acid model was wrong: peptic ulcers were not a verdict on the patient’s worry, ambition or diet but, in roughly 90% of duodenal and up to 80% of gastric cases, a curable infection with Helicobacter pylori. From the Croatian-Austrian surgeon Dragutin (Carl) Schwarz’s 1910 dictum Ohne sauren Magensaft kein peptisches Geschwür — “no acid, no ulcer” — physicians taught that an ulcer reflected too much stress and spice. The promise was a coherent story; the delivered reality was some seventy years of treatments that suppressed acid and managed symptoms while never touching the cause.
The reversal began in Perth, Western Australia. In 1979 pathologist J. Robin Warren saw small curved bacteria colonising the lower stomach of biopsy patients, always alongside inflammation — against the textbook certainty that gastric acid sterilised the stomach. With clinician Barry Marshall, Warren cultured the organism in 1982 (a chance success after an Easter-weekend plate was left incubating past the usual 48 hours), and the pair published in The Lancet in 1983 and 1984. The establishment did not believe them, so in late July 1984 Marshall drank a broth of the bacterium, developed acute gastritis within days, documented it by endoscopy, and cured it with antibiotics — satisfying Koch’s postulates on his own stomach lining.
Displacement was total but slow. A US NIH Consensus panel (12–14 Feb 1994) accepted that H. pylori caused most peptic ulcers and that a short antibiotic course could cure a disease previously managed for life. On 3 October 2005 the Nobel Assembly awarded Warren and Marshall the Prize in Physiology or Medicine “for their discovery of the bacterium Helicobacter pylori and its role in gastritis and peptic ulcer disease” — the formal certificate of a dogma revoked.
This dossier files the stress-and-acid model as TH-002 not as fraud — it was sincere, taught in good faith — but as the family’s purest specimen of an honest, near-universal theory displaced by a confirmed mechanism: institutional confidence, not dishonesty, was the obstacle, and the cost was measured in years of curable suffering prolonged.
Hysteria entered Western medicine through the Hippocratic Corpus of the 5th and 4th centuries BC, which attributed a roster of female complaints — convulsions, suffocation, paralysis, mood disturbance — to a uterus that wandered the body in search of moisture, and the gap between that promise of explanation and its evidentiary basis never closed across the twenty-four centuries the diagnosis survived. The mechanism was anatomically impossible; Galen had said as much in the 2nd century AD, noting the womb could not “move from one place to another like a wandering animal.” Yet the label outlived its own physiology. What persisted was not the wandering-womb anatomy but the diagnostic habit it licensed: a single, elastic category onto which a clinician could map almost any unexplained symptom in a woman, and, by the 19th century, blame on her reproductive organs, her nerves, or her sex itself.
The diagnosis was never retracted by an experiment; it was dissolved by reclassification. By the late 1800s “hysteria” had become one of the most frequently assigned disorders in European and American medicine, a major form of neurotic illness diagnosed predominantly in women and treated with regimens ranging from marriage and pregnancy to the “rest cure,” pelvic manipulation, and, in extreme cases, surgical removal of the ovaries. Jean-Martin Charcot relocated it from the uterus to the nervous system at the Salpêtrière in the 1870s and 1880s; Sigmund Freud and Josef Breuer relocated it again, in their 1895 Studies on Hysteria, to repressed psychological trauma. Each move stripped away a layer of the original etiology without retiring the word.
The formal revocation came on a date psychiatry can name. When the American Psychiatric Association published the third edition of its Diagnostic and Statistical Manual in 1980, “hysterical neurosis” was deleted as a unified entity and its fragments redistributed into discrete, criteria-based diagnoses — conversion disorder, somatization disorder (the streamlined heir to Briquet’s syndrome), the dissociative disorders, and histrionic personality disorder. The wandering womb retains no medical standing whatsoever, and the gendered super-category that succeeded it was judged too vague, too sexed, and too entangled in bad science to survive contact with operational criteria.
This dossier files “Overturned” entry TH-009 as the archetype of a theory revoked not by a single trial but by an institution editing its own manual: a diagnosis that endured because it explained nothing and therefore could be made to explain anything, and that fell only when psychiatry agreed to require that a category say something specific.
The tongue map — the four-lobed schematic teaching that sweetness is sensed at the tip, saltiness and sourness along the sides, and bitterness at the back — was never a finding; it was a graphing accident, introduced to the English-speaking world by Harvard experimental psychologist Edwin G. Boring in his 1942 history Sensation and Perception in the History of Experimental Psychology. The gap between the diagram’s authority and its evidence was total from the start: the underlying data, David P. Hänig’s 1901 paper Zur Psychophysik des Geschmackssinnes, described only slight regional differences in detection thresholds, not exclusive zones. No region of a healthy tongue is blind to any basic taste. The map promised a tidy anatomy of flavor; what it delivered was a decorative misreading of a line graph that lost its scale.
Hänig had measured that the tip was marginally more sensitive to sweet and salt and the edges marginally more sensitive to sour — differences “on the order of” a few percent in threshold, not presence-versus-absence. Boring re-plotted and normalized those curves to make them comparable; in doing so he stripped the y-axis of meaningful scale. Downstream textbook authors then read each curve’s minimum as “no sensation here” and its maximum as “the taste lives here,” converting a smear of small gradients into four hard borders. The error compounded because it was visually satisfying and easy to test in a classroom — a child dabbing sugar on the tip “confirms” it — even though the demonstration confirms nothing.
The diagram lived as accepted science for roughly three decades before physiologist Virginia B. Collings retested it directly. Her 1974 study in Perception & Psychophysics mapped recognition thresholds and intensity functions for sweet, salt, sour, and bitter across multiple tongue loci and the soft palate, and found all four qualities detectable everywhere taste buds exist — with the regional variation being small and, in places, the opposite of the textbook prediction. The molecular verdict followed decades later: the receptor proteins for sweet, bitter, and umami (the T1R and T2R families) and the channels for sour and salt are distributed across all lingual taste fields, not partitioned by region.
This dossier files “Overturned” entry TH-014 as the family’s purest specimen of a claim no one ever actually made — a dogma assembled by mistranslation and lazy re-graphing, propagated by textbooks rather than by any wrong experiment, refuted in 1974, and still printed in classrooms half a century after its disconfirmation.