---
license: mit
tags:
- arxiv:2608.20054
- research
- emergent-communication
- compositional-generalization
---

# POPULUS — paired-visibility battery checkpoints

Final checkpoints for **"What You Can't See Is What You Learn: Restricted
Evidence Visibility Favors Compositional Generalization in Shared-Genome
Language-Model Societies"** (Narcis Marincat, 2026; [arXiv:2608.20054](https://arxiv.org/abs/2608.20054)).

Twenty-two files: nineteen society finals (`run3v_F_{P|G}_m<init>_o<order>_ckpt_final.pt`
— P = restricted visibility, G = global visibility; the twentieth, P
init 202 / order 952, is marooned on an unreachable provider instance and
disclosed in the paper) and three staged centralized comparators
(`posctl_F_s93*_ckpt_final.pt`).

Each checkpoint contains the trainable bridge parameters, the shared rank-8
LoRA, and optimizer/RNG state for bit-exact resume, over a frozen
Qwen2.5-0.5B-Instruct backbone (not included; loaded from its own
distribution). Evaluation code, result records, preregistration, and the
incident ledger: https://github.com/tokenosopher/populus-evidence-partitioning