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belief revision

The problem of belief revision comes up when integrating different sources of information
into a current belief system, with a minimal impact on such change. In addition,
the system must be kept consistent. There are at least two situations in which the
information may be inconsistent: that new information contradicts previous one, and
that the integrity of current information need be restored. The former may have to
do with updates, depending on the “openness” of the environment. On the other hand,
the other situation has to do just with belief revision, which is the focus of this section. [Guadarrama, 2009]
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