Textual Bayes: Quantifying Prompt Uncertainty in LLM-Based Systems - Ross, Brendan; Vouitsis, Noël; Ashari Ghomi, Atiyeh; Hosseinzadeh, Rasa; Xin, Ji; Liu, Zhaoyan; Sui, Yi; Hou, Shiyi; Leung, Kin Kwan; Loaiza-Ganem, Gabriel; Cresswell, Jesse (International Conference on Learning Representations, 2026)