In a database, a rule is defined as (P1 and P2) or P3? R1 (0.8) and R2 (0.3). Where P1, P2, P3 are premises and R1, R2 are conclusions of rules with certainty factors (CF) 0.8 and 0.3 respectively. If any running program has produced P1, P2, P3 with CF as 0.5, 0.8, 0.2 respectively, find the CF of results on the basis of premises.

Correct option is B

It is a numeric value that quantifies how likely an event or statement is true, based on a rule and premises. CF combines probabilities and weights to calculate dynamic certainty for conclusions.
Given Rule:
(P1 AND P2) OR P3
Certainty Factors Provided:
· CF(R1) = 0.8
· CF(R2) = 0.3
· Premises:
o CF(P1) = 0.5
o CF(P2) = 0.8
o CF(P3) = 0.2
Step-by-Step Solution:
Step 1: Evaluate (P1 AND P2):