Jivaro Tsantsas or Shrunken Head
Bibliographic record
Abstract
Forensic scientists sometimes apply knowledge and modern techniques to various historical challenges. Reported here is an unusual expertise of a shrunken head authenticity evaluation. Tsantsas, or shrunken head, are an ancient traditional technique of the Jivaro Indians from Northern Peru and Southern Ecuador. Tsantsas were made from enemies' heads cut on the battlefield. Then, during spiritual ceremonies, enemies' heads were carefully reduced through boiling and heating, in the attempt to lock the enemy's spirit and protect the killers from spiritual revenge. However, forgers have made fake tsantsas out of sloth heads, selling them as curios to international travelers. Morphologic criteria can help in the distinction of forged and authentic tsantsas. Presence of sealed eyelids, pierced lips with strings sealing the mouth, shiny black skin, a posterior sewn incision, long glossy black hair, and lateral head compression are characteristic of authentic tsantsas. On the other hand, fake tsantsas usually present few or none of those criteria. To establish authenticity of the shrunken head, we used all of the above-mentioned morphologic criteria along with microscopic hair examination and DNA analysis.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.043 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".