Common ground
共同基础（共同地基）：对话双方默认彼此共享的知识、信念与假设，由说话者与听者通过持续的「奠基（grounding）」行为不断维护与更新。
English Definition
"The mutual knowledge, beliefs, and assumptions that interlocutors presuppose to be shared in a conversation, which they continually update through grounding actions."
用法说明 · 针对中文母语者
源自 Clark & Wilkes-Gibbs 的 grounding 理论，是 HCI 协作设计与对话系统研究的基础概念；中文也常译作「共识基础」「共享背景」。
真实用例 · 2 条
"Work in HHCC have identified key mechanisms such as perspective-taking, theory of mind, the establishment of common ground [13] and Gricean cooperative principles [42] as prerequisites for negotiating this division of labour"
"users engage in perspective-taking by adjusting their utterances to what they believe the agent can or cannot see, attribute theory of mind to agents based on their behaviour, and transfer the common ground established with one conversational system to others."