Comment by catpolice

I'm not sure I'm able to answer that in a satisfying way just because my memory is fallible. The degree to which the system is unsure of something (to the degree to which that can be coarsely represented) certainly shows up in the results, and I suspect the underlying search heuristics tend to prioritize things with a represented higher confidence level.

The latter thing sounds like something Doug Lenat has wanted for years, though I think it mostly comes up in cases where the information available is ambiguous, rather than unreliable. There are various knowledge entry schemes that involve Cyc dynamically generating more questions to ask the user to disambiguate or find relevant information.