Subjective Logic Operators Demo
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|b: belief||is the belief that the proposition is true.|
|d: disbelief||is the belief that the proposition is false.|
|u: uncertainty||is belief that is neither committed to truth nor falsehood of the proposition.|
|a: base rate||is the a priori probability of the proposition in the absence of specific belief. The default value is the relative atomicity, i.e. 0.5 for a binary state space containing the proposition and its complement.|
Opinions can be visualized on opinion triangles. A blue point represents a (b,d,u) triple. The b,d,u-axes run from one side to the opposite vertex indicated by the letters b, d and u. For example, a strong positive opinion is represented by a point towards the bottom right b-vertex. The base rate, also called relative atomicity, is shown as a pointer along the base line, and the probability expectation, E, is formed by projecting the opinion onto the base, parallel to the base rate `projector' line.
Scroll down to try subjective logic operators in action. Right-click on the operator symbol to select one of the operators Complement(NOT), Addition, Subtraction, Multiplication(AND), Comultiplication(OR), Division(UN-AND), Codivision(UN-OR), Discount(trust transitivity), Consensus(Fusion), Conditional Deduction or Conditional Abduction. Left-click and drag the opinion points and the base rate pointers on the left triangles to set the argument opinions. The computed result opinion is represented on the right-most triangle.
Back to homepage.Last updated: 24 March 2011.