# BCSS synthesizes symbolic reasoning models across hundreds of problems > Source: > Published: 2026-11-06 07:51:02.239088+00:00 [arXiv](https://arxiv.org/abs/2611.07088) ### BCSS synthesizes symbolic reasoning models across hundreds of problems Which summary reads better? Pick one — models revealed after.Both summaries are AI-generated. The Behavior-Conditioned Symbolic Synthesis (BCSS) framework automates the extraction of deterministic, interpretable symbolic programs that verifiably reproduce the reasoning pathways of black-box AI models. For engineers shipping agents, this enables reverse-engineering unpredictable LLM reasoning into explicit, testable code to audit performance. This allows you to systematically detect and debug where your models oversimplify tasks or misinfer logical dependencies under different inference-compute budgets. A new method (BCSS) extracts interpretable, deterministic symbolic programs that verifiably reproduce an LLM's reasoning behavior across hundreds of problems, and the extracted programs show models systematically oversimplify, adopt partial rules, and misinfer feature dependencies — with higher reasoning effort reducing the shortcutting. Practically, this gives you a way to audit black-box model reasoning as explicit rules rather than guessing from outputs, and it confirms that increasing inference-time compute measurably reduces satisficing-style errors, so budget reasoning tokens accordingly on tasks where those failure modes bite.