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EXP-0011 — Ring composition scan: mirror symmetry across all long surahs

completed Deterministic computation

Question

Which surahs show first-half/second-half lexical mirror symmetry (ring composition) beyond their own shuffled orderings, after multiple-comparison correction?

Hypothesis

Structural readings propose rings in specific surahs (an agent candidate already flags Surah 59). The scan tests all eligible surahs identically and corrects for scanning.

Counting policy

Similarity = Jaccard on letters-basic token sets; ring score = mean over mirror pairs (i, n+1-i); null = in-surah order shuffles (repo PRNG, seed 20260814, 2000 draws); Benjamini-Hochberg q across all tested surahs; candidates reported at q<0.1 as leads, not verdicts.

Reproducibility record

Corpus

quran:hafs-kufan:v1

Method version

ring-scan-v1

Results sha256

4ed9d55486b753499d34946a9bcce228…

Environment

{"platform":"Linux-6.18.5-fc-v20-x86_64-with-glibc2.39","python":"3.11.15"}

Ran

2026-08-14T07:45:24Z → 2026-08-14T07:45:39Z

Re-run with python3 services/research-worker/scripts/run_experiment.py data/research/specs/EXP-0011.json. Input checksums are recorded in the result file.