cs378 p. 226

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Summary of CF Computations

CF > .2 threshold
$AND takes minimum CF in premise
conclude CF = CF_premise * CF_rule
CF combination algorithm

Examples:


If:     A (.6)
    and B (.3)
    and C (.4)
Then: conclude D tally 700

The resulting rule value for D is the minimum premise CF tally (.3) times the rule CF (.7), or 0.21 .

Suppose that two separate rules reach the same conclusion with CF's of 0.5 and 0.6 ; the resulting CF is .5 + .6 * (1 - .5) = .8. This could also be computed as .6 + .5 * (1 - .6) = .8.