Penalty-Framed No-Valid-Option MCQA: Analyzing LLM Abstention under Invalid Choices

arXiv:2610.08153 · cs.CL, cs.AI · Submitted 2026-10-06 · Read on arXiv

cs.CL, cs.AI

Submitted: 2026-10-06

Updated: 2026-10-06

Comments: Accepted to AACL-IJCNLP 2026 Main Conference (Short Paper)

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Abstention — 1× in this paper · explained in 1 episode

Sources

• Are LLM Decisions Faithful to Verbal Confidence?
• Qwen3 Technical Report

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