Can One-sided Arguments Lead to Response Change in Large Language Models?

Pedro Cisneros-Velarde
2/5/2026
cs.CLcs.AI

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Abstract

Polemic questions need more than one viewpoint to express a balanced answer. Large Language Models (LLMs) can provide a balanced answer, but also take a single aligned viewpoint or refuse to answer. In this paper, we study if such initial responses can be steered to a specific viewpoint in a simple and intuitive way: by only providing one-sided arguments supporting the viewpoint. Our systematic study has three dimensions: (i) which stance is induced in the LLM response, (ii) how the polemic question is formulated, (iii) how the arguments are shown. We construct a small dataset and remarkably find that opinion steering occurs across (i)-(iii) for diverse models, number of arguments, and topics. Switching to other arguments consistently decreases opinion steering.

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@article{cisnerosvelarde2026onesided,
  title  = {Can One-sided Arguments Lead to Response Change in Large Language Models?},
  author = {Pedro Cisneros-Velarde},
  year   = {2026},
  eprint = {2602.06260},
  archivePrefix = {arXiv},
  url    = {http://arxiv.org/abs/2602.06260v1}
}

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