Simple Trust Network Demo

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Analyst A has a level of trust/distrust in sources B and C that in turn produce their respective opinions about the state of X. Each directional trust/opinion relationship (from left to right) between two nodes is represented as an opinion point inside the triangle on the edge between them. Analyst A receives advice opinions from B and C about X. This enables analyst A to derive her own opinion (bottom triangle) about X.

Left-click and drag opinion points and base rates to set the argument opinions. The demo shows how this simple trust network can be analysed using subjective logic operators to derive A's opinion about X, as shown by the bottom opinion triangle. In detail, trust transitivity means that analyst A discounts B's advice opinion about X by A's own trust opinion about B, and the same for C. Finally, A fuses the two discounted advice opinions using the cumulative fusion operator, producing the bottom derived opinion about X. See the book on subjective logic for the mathematical details.


JavaScript design by Gaëtan Bouguier. Original design concept by Matthew Davey.


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Last updated: 15 August 2017.