{
  "format_version": 3,
  "claim_formal": {
    "subject": "Napoleon Bonaparte's height",
    "property": "comparison of Napoleon's height to average French male height of his era (late 18th/early 19th century)",
    "operator": "<",
    "operator_note": "'stood shorter than' is interpreted as strictly less than: Napoleon's height < average French male height. Napoleon lived 1769-1821; 'his era' is interpreted as the late 18th to early 19th century. Heights are compared in centimeters. If Napoleon's height is equal to or greater than the average, the claim is DISPROVED. Napoleon's height was recorded in pre-metric French units (pieds and pouces). The French pouce (inch) was 2.71 cm vs the English inch at 2.54 cm. His recorded '5 pieds 2 pouces' translates to approximately 167-170 cm in modern units, not the 157 cm that a naive English conversion would yield.",
    "threshold": 3,
    "proof_direction": "disprove"
  },
  "claim_natural": "Napoleon Bonaparte stood shorter than the average Frenchman of his era.",
  "evidence": {
    "B1": {
      "type": "empirical",
      "label": "Britannica: Napoleon's height 5'6\"-5'7\" (1.68-1.7 m), typical French height 5'2\"-5'6\" (1.58-1.68 m)",
      "sub_claim": null,
      "source": {
        "name": "Encyclopaedia Britannica",
        "url": "https://www.britannica.com/story/was-napoleon-short",
        "quote": "Sources consequently estimate that Napoleon was probably closer to 5'6\" or 5'7\" (1.68 or 1.7 meters) than to 5'2\"."
      },
      "verification": {
        "status": "verified",
        "method": "full_quote",
        "coverage_pct": null,
        "fetch_mode": "live",
        "credibility": {
          "domain": "britannica.com",
          "source_type": "reference",
          "tier": 3,
          "flags": [],
          "note": "Established reference source"
        }
      },
      "extraction": {
        "value": "1.68 m (conservative lower bound)",
        "value_in_quote": true,
        "quote_snippet": "Sources consequently estimate that Napoleon was probably closer to 5'6\" or 5'7\" "
      }
    },
    "B2": {
      "type": "empirical",
      "label": "HowStuffWorks: Napoleon 169 cm in modern units, average French man over 5'5\"",
      "sub_claim": null,
      "source": {
        "name": "HowStuffWorks",
        "url": "https://history.howstuffworks.com/history-vs-myth/napoleon-short.htm",
        "quote": "At the time of his death, he measured 5 feet, 2 inches, in French units, the equivalent of about 5 feet, 6 inches, (169 centimeters)"
      },
      "verification": {
        "status": "verified",
        "method": "full_quote",
        "coverage_pct": null,
        "fetch_mode": "live",
        "credibility": {
          "domain": "howstuffworks.com",
          "source_type": "unknown",
          "tier": 2,
          "flags": [],
          "note": "Unclassified domain \u2014 verify source authority manually"
        }
      },
      "extraction": {
        "value": "169.0 cm = 1.69 m",
        "value_in_quote": true,
        "quote_snippet": "At the time of his death, he measured 5 feet, 2 inches, in French units, the equ"
      }
    },
    "B3": {
      "type": "empirical",
      "label": "History.com: Napoleon ~1.67 m, a little above average for early 1800s French man",
      "sub_claim": null,
      "source": {
        "name": "History.com (A&E Networks)",
        "url": "https://www.history.com/articles/napoleon-complex-short",
        "quote": "Applying the French measurements of the time, that equals around 1.67 meters, or just under 5'6\", which is a little above average for a French man in the early 1800s"
      },
      "verification": {
        "status": "verified",
        "method": "full_quote",
        "coverage_pct": null,
        "fetch_mode": "live",
        "credibility": {
          "domain": "history.com",
          "source_type": "unknown",
          "tier": 2,
          "flags": [],
          "note": "Unclassified domain \u2014 verify source authority manually"
        }
      },
      "extraction": {
        "value": "1.67 m",
        "value_in_quote": true,
        "quote_snippet": "Applying the French measurements of the time, that equals around 1.67 meters, or"
      }
    },
    "B4": {
      "type": "empirical",
      "label": "Britannica: most Frenchmen stood 5'2\"-5'6\" (1.58-1.68 m) in 19th century",
      "sub_claim": null,
      "source": {
        "name": "Encyclopaedia Britannica",
        "url": "https://www.britannica.com/story/was-napoleon-short",
        "quote": "it was typical in the 19th century, when most Frenchmen stood between 5'2\" and 5'6\" (1.58 and 1.68 meters) tall"
      },
      "verification": {
        "status": "verified",
        "method": "full_quote",
        "coverage_pct": null,
        "fetch_mode": "live",
        "credibility": {
          "domain": "britannica.com",
          "source_type": "reference",
          "tier": 3,
          "flags": [],
          "note": "Established reference source"
        }
      },
      "extraction": {
        "value": "1.58-1.68 m range",
        "value_in_quote": true,
        "quote_snippet": "it was typical in the 19th century, when most Frenchmen stood between 5'2\" and 5"
      }
    },
    "A1": {
      "type": "computed",
      "label": "Napoleon's height from Britannica (conservative, lower bound)",
      "sub_claim": null,
      "method": "parse_number_from_quote(B1, lower bound)",
      "result": "1.68 m",
      "depends_on": []
    },
    "A2": {
      "type": "computed",
      "label": "Average French male height upper bound from Britannica",
      "sub_claim": null,
      "method": "parse_number_from_quote(B4, upper bound of range)",
      "result": "1.68 m",
      "depends_on": []
    },
    "A3": {
      "type": "computed",
      "label": "Height comparison: Napoleon vs average Frenchman",
      "sub_claim": null,
      "method": "compare(1.68, '<', 1.68)",
      "result": "False \u2014 Napoleon (1.68 m) was NOT shorter than average (1.68 m)",
      "depends_on": []
    },
    "A4": {
      "type": "computed",
      "label": "Verified source count confirming Napoleon was not shorter",
      "sub_claim": null,
      "method": "count(verified citations) = 4",
      "result": "4",
      "depends_on": []
    }
  },
  "cross_checks": [
    {
      "description": "Napoleon's height cross-checked across three independent sources",
      "values": {
        "britannica": "1.68 m",
        "howstuffworks": "1.69 m",
        "history_com": "1.67 m"
      },
      "agreement": "All three sources agree within 0.03 m (1.67-1.69 m range)",
      "independence_note": "Sources are from different publishers: Encyclopaedia Britannica, HowStuffWorks (InfoSpace), and History.com (A&E Networks)",
      "coi_flags": [],
      "fact_ids": []
    },
    {
      "description": "Average French male height corroborated by academic anthropometric data",
      "values": {
        "britannica_range": "1.58-1.68 m",
        "academic_estimate": "162-165 cm (Komlos et al., military records)"
      },
      "agreement": "Consistent \u2014 Britannica range encompasses academic estimates",
      "independence_note": "Academic anthropometric data from military conscription records vs reference encyclopedia",
      "fact_ids": []
    }
  ],
  "adversarial_checks": [
    {
      "question": "Is there any credible historical source that measured Napoleon as genuinely short for his era?",
      "verification_performed": "Searched for 'Napoleon actually short evidence historical measurement'. Found that the '5 foot 2' figure from Antommarchi's autopsy is in French units, not English. No credible historian argues Napoleon was below average when the correct unit conversion is applied.",
      "finding": "The short myth originates entirely from the French/English inch confusion and British propaganda cartoons by James Gillray. No modern historical source supports the claim that Napoleon was shorter than average.",
      "breaks_proof": false
    },
    {
      "question": "Could 'his era' refer to a time period when average French height was much taller?",
      "verification_performed": "Searched for 'average height French men 1770 1800 1820 anthropometric history'. Consulted academic sources on French anthropometric history (Komlos et al.). Average male height in France in the late 18th/early 19th century was approximately 162-165 cm based on military conscription records.",
      "finding": "Anthropometric data consistently places average French male height at 162-165 cm for Napoleon's era. Even the most generous estimate (165 cm / ~5'5\") is below Napoleon's measured height of 167-170 cm. The claim fails under all reasonable interpretations of 'his era'.",
      "breaks_proof": false
    },
    {
      "question": "Did Napoleon's height change significantly over his lifetime \u2014 could he have been short as a young man?",
      "verification_performed": "Searched for 'Napoleon height young man military academy'. Found references to his nickname 'le petit caporal' (the little corporal), which some sources note was a term of affection from his soldiers, not a reference to physical stature.",
      "finding": "The nickname 'le petit caporal' was a term of endearment, not a height description. No source provides measurements of Napoleon as a young man that differ significantly from the adult measurements of 167-170 cm. His elite Imperial Guard were selected for height (minimum 5'10\"), creating an optical illusion of Napoleon being short by comparison.",
      "breaks_proof": false
    }
  ],
  "verdict": {
    "value": "DISPROVED",
    "qualified": false,
    "qualifier": null,
    "reason": null
  },
  "key_results": {
    "napoleon_height_conservative_m": 1.68,
    "napoleon_height_hsw_m": 1.69,
    "napoleon_height_hist_m": 1.67,
    "avg_french_range_m": "1.58-1.68",
    "avg_french_midpoint_m": 1.63,
    "napoleon_minus_avg_cm": 0.0,
    "n_confirmed_sources": 4,
    "claim_napoleon_shorter": false
  },
  "generator": {
    "name": "proof-engine",
    "version": "1.16.0",
    "repo": "https://github.com/yaniv-golan/proof-engine",
    "generated_at": "2026-04-16"
  },
  "proof_py_url": "/proofs/napoleon-bonaparte-stood-shorter-than-the-average/proof.py",
  "citation": {
    "doi": null,
    "concept_doi": null,
    "url": "https://proofengine.info/proofs/napoleon-bonaparte-stood-shorter-than-the-average/",
    "author": "Proof Engine",
    "cite_bib_url": "/proofs/napoleon-bonaparte-stood-shorter-than-the-average/cite.bib",
    "cite_ris_url": "/proofs/napoleon-bonaparte-stood-shorter-than-the-average/cite.ris"
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  "depends_on": []
}