FOUNDATION FOR INTELLIGENT PHYSICAL AGENTS

FIPA Disconfirm Communicative Act Specification

Document title	FIPA Disconfirm Communicative Act Specification
Document number	DC00044A	Document source	FIPA TC C
Document status	Deprecated	Date of this status	2000/10/16
Supersedes	None
Contact	fab@fipa.org
Change history
2000/10/16	Deprecated by FIPA00037

Geneva, Switzerland

Notice

Use of the technologies described in this specification may infringe patents, copyrights or other intellectual property rights of FIPA Members and non-members. Nothing in this specification should be construed as granting permission to use any of the technologies described. Anyone planning to make use of technology covered by the intellectual property rights of others should first obtain permission from the holder(s) of the rights. FIPA strongly encourages anyone implementing any part of this specification to determine first whether part(s) sought to be implemented are covered by the intellectual property of others, and, if so, to obtain appropriate licenses or other permission from the holder(s) of such intellectual property prior to implementation. This specification is subject to change without notice. Neither FIPA nor any of its Members accept any responsibility whatsoever for damages or liability, direct or consequential, which may result from the use of this specification.

Foreword

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Contents

1 Scope. 1

2 Disconfirm.. 2

3 References. 3

1 Scope

This document specifies the Disconfirm communicative act which is compliant to [FIPA00037] requirements.

2 Disconfirm

Summary	The sender informs the receiver that a given proposition is false, where the receiver is known to believe, or believe it likely that, the proposition is true.
Content	A proposition.
Description	The disconfirm act is used when the agent wishes to alter the known mental attitude of another agent. The sending agent: · believes that some proposition is false, · intends that the receiving agent also comes to believe that the proposition is false, and, · believes that the receiver either believes the proposition, or is uncertain of the proposition. The first two properties defined above are straightforward: the sending agent is sincere, and has (somehow) generated the intention that the receiver should know the proposition (perhaps it has been asked). The last pre-condition determines when the agent should use confirm (see [FIPA00043]), inform (see [FIPA00046]) or disconfirm: disconfirm is used precisely when the other agent is already known to believe the proposition or to be uncertain about it. From the receiver's viewpoint, receiving a disconfirm message entitles it to believe that: · the sender believes that the proposition that is the content of the message is false, and, · the sender wishes the receiver to believe the negated proposition also. Whether or not the receiver does, indeed, change its mental attitude to one of disbelief in the proposition will be a function of the receiver's trust in the sincerity and reliability of the sender.
Formal Model	<i, disconfirm( j, f )> FP: B_iØf Ù B_i(U_jf Ú B_jf) RE: B_jØf
Example	Agent i, believing that agent j thinks that a shark is a mammal, attempts to change j's belief. (disconfirm :sender i :receiver j :content (mammal shark))

3 References

[FIPA00037] FIPA Communicative Act Library Specification. Foundation for Intelligent Physical Agents, 2000. http://www.fipa.org/specs/fipa00037/

[FIPA00043] FIPA Confirm Communicative Act Specification. Foundation for Intelligent Physical Agents, 2000. http://www.fipa.org/specs/fipa00043/

[FIPA00046] FIPA Inform Communicative Act Specification. Foundation for Intelligent Physical Agents, 2000. http://www.fipa.org/specs/fipa00046/