Lost in the Fallback: How Reliably Do Typed Decision Models Use Fallback Options?

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arXiv:2610.19856v1 Announce Type: new Abstract: Typed decision models (TDMs) are increasingly used in applications such as request routing and model selection, making reliable decisions critical to system performance. Fallback options accommodate categories outside regular choices, enabling deferral to human experts or more capable models. While recent works have examined adversarial vulnerabilities in TDMs, their ability to follow fallback rules in non-adversarial settings remains underexplore