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Dakota Reference Manual
Version 6.15
Explore and Predict with Confidence
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Epistemic uncertainty is uncertainty due to lack of knowledge.
In Dakota, epistemic uncertainty analysis is performed using interval analysis or Dempster-Shafer theory of evidence.
Note that epistemic uncertainty can also be modeled probabilistically. It would be more accurate to call this class of method, non-probabilistic uncertainty quantification, but the name persists for historical reasons.