## Subjective Logic Operators Demo |
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: bbelief |
is the belief that the proposition is true. |

: ddisbelief |
is the belief that the proposition is false. |

: uuncertainty |
is belief that is neither committed to truth nor falsehood of the proposition. |

: abase 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.

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Last updated: 24 March 2011.