ResearchResearch paperLarge Language Models1 source · Oct 16, 2026

Where Research Ideation Begins: Forward-Citation Supervision for Actionable Limitation Generation

Starting from a pilot study, we find that as large language models (LLMs) scale from 0.6B to 32B parameters, they become far better at recognizing which limitation later work addressed, but no better at generating one, suggesting that the bottleneck lies in the supervision signal rather than model capacity.

Key points

  • Automated research ideation has advanced rapidly, with multi-agent workflows that generate whole research ideas end to end.
  • In this paper, we focus on this first step in the research ideation pipeline.
  • We therefore construct ActLim-Bench from forward citations, yielding 18,279 evidence-linked supervision triples with human verification.
  • On this signal, we propose a three-stage post-training pipeline: supervised fine-tuning, verifier-filtered rejection-sampling fine-tuning, and reinforcement learning with the verifier as an online dense reward.

Sources (1)

  • [1]Where Research Ideation Begins: Forward-Citation Supervision for Actionable Limitation Generation
    arXiv (AI, ML, NLP, CV, robotics, multi-agent) · Oct 16, 07:14 AM
    Starting from a pilot study, we find that as large language models (LLMs) scale from 0.6B to 32B parameters, they become far better at recognizing which limitation later work addressed, but no better at generating one, suggesting that the bottleneck lies in the supervision signal rather than model capacity.
    Automated research ideation has advanced rapidly, with multi-agent workflows that generate whole research ideas end to end.

Extractive summary: sentences quoted from the sources.

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