Information Technology Reference
In-Depth Information
the current movie is good is 1 . 0. In fact, we (and agent A 1 )donotmake
any assumption whatsoever on the probabilities of the current movie's
quality being good, average, or bad. Agent A 1 's opinion B 1 =
}
is simply that, 'From my (i.e., agent A 1 's) limited experience so far
concerning the quality of the S.F. movies directed by Spielberg, which
happens to be self-consistent, I have reason to believe that the quality
of the current movie, being also an S.F. movies directed by Spielberg,
is good. However, I do not say that the quality of the current movie
must be good. I am not going to give any opinions on the probability
or possibility that the quality of the current movie is average or bad,
either. I only say that it is my belief that the quality of the current
movie is good'.
{
Good
Example 3.9 Let's continue from above discussion in Example 3.7.
We consider two specific consequences x 1 =(tennis, tennis, tennis,
tennis) and x 2 =(movie, movie, movie, movie). The preference rules
of A 3 are still the four rules P1 to P4 in Section 3.3.
P1.
x 2 3 x 1
P2. { Average }⇒x 1 3 x 2
P3. { Bad }⇒x 1 3 x 2
P4.
{
Good
}⇒
x 1 3 x 2
In order to decide which preference rules are fired, we check if
any of the left hand side of the preference rules matches the opinion
B 3 =
{
Average , Bad
}⇒
. Unfortunately, no matching is found. So, we
look for partial matching that matches a subset of the opinion. Given
the opinion of A 3 ,whichis B 3 =
{
Good , Averge
}
, both Rules P1 and
P2 partially match in this case, and both rules are fired. Intuitively,
both Rules P1 and P2 are 'covered' by the opinion of A 3 .RulesP3
and P4 are not fired because they are not 'completely covered' by the
opinion of A 3 . In this particular case, the preference of the agent A 3 is
said to be in conflict as the right hand sides of the two fired rules do not
contain the same value. Actually they contain the directly conflicting
information: by rule P1, x 2 is better than x 1 , but by rule P2, x 1 is
{
Good , Averge
}
Search WWH ::




Custom Search