probabilistic inference systems that take a holistic
view of the assertion graph and try to reconcile the
results of multiple paths of exploration.
As figure 2 shows, the process can go through multi-
ple iterations, during which the nodes that were the
answers to the previous round of questions can be
used to ask the next round of questions, producing
more nodes and edges in the graph.
After each iteration we may do hypothesis identification, where some nodes in the graph are identi-
Figure 2. Scenario-Based Question-Answering Architecture.
(may ask questions
be de;ned in