13. The computer program product of claim 12 , wherein assigning the hypothesis confidence score for a given hypothesis comprises determining the hypothesis confidence score based on a number of paths leading to the given hypothesis.
12. The computer program product of claim 8 , wherein ranking the set of hypotheses comprises assigning a hypothesis confidence score to each hypothesis in the set of hypotheses based on the answer confidence value, wherein presenting the ranked set of hypotheses comprises presenting a hypothesis confidence value for each hypothesis in the ranked set of hypotheses.