4.1 Grounding mechanisms are use to built shared sub-spaces

4.1.2 Grounding inferences

Detectives have to ground the inferences they draw from the basic facts, such as "Hans could not get the gun". Such inferences lead step by step to the final goal: to find a suspect who had a motive for the crime, the opportunity to get the murder weapon and the opportunity to kill. These inferences are also persistent: they remain true as long as they are not disproved. Moreover, there is a low probability that a detective will spontaneously make the same inference as his partner (level 1), but relatively high chances to misunderstand (level 3) or disagree (level 4). Hence, it is not surprising to observe that in general this type of information is explicitly grounded. These grounding dialogues go from fairly simple cases as in example 6 to complex negotiation as in example 7. These excerpts often include other action in the MOO in order to verify elements, but the grounding process is essentially conducted by MOO discussions. One particular aspect that pairs have to negotiate is whether they have reached the solution or not: "Do you want to look around or do we tell David we have finished?" (2:13:11; protocol 4.2); "Do you think we have finished then?" (1:38:56, protocol 6.2).

Grounding in Multi-modal Task-Oriented Collaboration - 3 SEP 1996
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