Three seals over a broken chain

Claim (verbatim)

Siamese law claims a continuous pedigree back to fourteenth-century Ayutthaya, but its entire textual base passed through a needle's eye in 1805, when Rama I — scandalized by the Amdaeng Pom divorce case, in which a judge upheld a wife's right to leave a blameless husband on the strength of a law text the king held to be corrupt — ordered the surviving legal manuscripts collated and revised. The commission worked from whatever had escaped 1767; the product, the Kotmai Tra Sam Duang, was authenticated in master sets stamped by the three great ministries' seals, and everything Siamese law now knows of Ayutthaya legislation is what passed that filter. The conjecture is that the Three Seals Code is a reconstruction horizon of the same kind as the Bangkok chronicles: its laws carry grand Ayutthaya-era promulgation dates reaching back toward the kingdom's founding, but the transmission chain behind them is post-catastrophe and short, and the internal dating apparatus should betray it — accumulated copying and editorial reworking leave era-dates whose cyclical elements no longer cross-check, at rates far above what a continuously proofread living archive would tolerate. Prediction: no manuscript witness of any Siamese law text will predate the Bangkok era — zero surviving legal manuscripts copied before 1782 — and among the Three Seals Code's fully specified Ayutthaya-era dates (year, cyclical elements, weekday), at least one quarter will fail their own internal cross-checks when converted, the corruption concentrating in laws bearing the earliest nominal dates (primary clause: the zero pre-1782 witnesses census; the verdict follows it). Kill: the Thammasat University edition of the Kotmai Tra Sam Duang, with Michael Vickery's critical studies of the code's chronology and Yoneo Ishii's analysis in M.B. Hooker (ed.), The Laws of South-East Asia, vol. I (1986).

Prediction clause (verbatim)

Prediction: no manuscript witness of any Siamese law text will predate the Bangkok era — zero surviving legal manuscripts copied before 1782 — and among the Three Seals Code's fully specified Ayutthaya-era dates (year, cyclical elements, weekday), at least one quarter will fail their own internal cross-checks when converted, the corruption concentrating in laws bearing the earliest nominal dates (primary clause: the zero pre-1782 witnesses census; the verdict follows it).

Kill-dataset (verbatim)

Kill: the Thammasat University edition of the Kotmai Tra Sam Duang, with Michael Vickery's critical studies of the code's chronology and Yoneo Ishii's analysis in M.B. Hooker (ed.), The Laws of South-East Asia, vol. I (1986).

Novelty / leakage triage

anticipated in the literature — this exact test has never been run

That the Three Seals Code is a post-1805 reconstruction - Rama I's commission working after the 1767 destruction, the Amdaeng Pom trigger, the three-ministry seal authentication - is standard (Lingat's edition; Ishii in Hooker 1986), so the reconstruction picture the conjecture assumes is not itself novel. But the primary clause is a universal census - zero surviving Siamese legal manuscripts copied before 1782 across all law texts - which has not been compiled and stated exhaustively, and the discriminating internal test (at least a quarter of the code's fully specified Ayutthaya-era dates failing their own cyclical cross-checks, concentrated in the earliest laws) is plainly un-run. The neighborhood is well worked; the census and the date-corruption arithmetic are not. Adjacent.

• R. Lingat (ed.), Pramuan Kotmai Ratchakan thi 1 [Kotmai Tra Sam Duang / Three Seals Code], 3 vols (Bangkok, 1938)
• Yoneo Ishii, 'The Thai Thammasat', in M.B. Hooker (ed.), The Laws of South-East Asia, vol. I: The Pre-Modern Texts (Singapore: Butterworths, 1986)

Predictions

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