...B.

perhaps discounting the paradoxical case where an agent believes that his own belief is mistaken.

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...meant.

Strictly speaking, this mutuality is stronger than just a commonality of attitudes, as described in the previous section. While this commonality can be deduced from mutuality, mutual belief also includes (at least) the additional belief that the commonality holds. See [Clark and Marshall1981, Barwise1989, Halpern and Moses1990] for a discussion of some of the issues involved.

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...subjects.

This data is being made available on the web through http://tecfa.unige.ch/tecfa/tecfa-research/cscps/bootnap.html

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...room.

A third command, emote, used for third person narration, was not utilized in our setting.

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...exchanges.

As an example, in Dialogue 4T1 at time 1:08:04, one partner pages to the other: ``i'm fed up with all these pages I join you''.

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...system.

BeingThere is a groupware program from Intelligence at Large.

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...non-collaboratively.

Individuals in some pairs gathered up evidence without telling their partners - this made it difficult to work together or even find the information individually.

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