---
license: cc-by-nc-4.0
language: en
tags: [authorship, embeddings, book-of-mormon-authorship, 1780-1830]
---

# Style encoder (BOM-30)

Authorship style embeddings (Amendment 24): the time-locked model fine-tuned with a contrastive
objective so that passages by the same author land close together. `297m/style.pt` and
`590m/style.pt` are the encoders on the 297M and 590M backbones (`style_embed.train.StyleEncoder`
in the GitHub repository; `load_encoder(path, cfg, "base")` or `"mid"`), with their training
logs. Benchmark: 297M 0.839 right author, 0.500 false matches (`benchmark_297m.json`); 590M 0.839,
0.628 (`benchmark_590m.json`).

## About

Part of an open, pre-registered study of the authorship, borrowing and dating of the
earliest Book of Mormon text (https://github.com/lifehug/book-of-mormon-authorship; pre-registration https://osf.io/6ugxc/). The project does not argue for or
against divine inspiration. Everything is published so it can be checked and redone; the corpus
texts we agreed to keep private are not, and the repository's `docs/replication.md` gives the
steps to obtain the same access.

**Licence:** CC BY-NC 4.0. **Training data:** English printed 1780-1830 (Internet Archive, Harvard
Institutional Books 1.0, HathiTrust public-domain volumes, Text Creation Partnership), with the
Book of Mormon and everything after 1830 removed; see the base model cards
(`etherfuse/timelocked-1830-125m`). Contains derivatives of Harvard Institutional Books 1.0,
Institutional Data Initiative, Harvard Law School Library; used for noncommercial research.
**Checksums:** every file's SHA-256 is in the GitHub repository, `data/manifests/hf_<repo>.jsonl`.