Blurb::
A surrogate model pointer that guides a method to whether it should use a surrogate model or compute truth function evaluations
Description::
Dakota methods use global surrogate models to compute surrogate function approximations. They also need to know the true function evaluations. A global surrogate model now must have a truth_model_pointer keyword to decide for the method whether to evaluate the global surrogate model, or compute the true function evaluations if truth_model_pointer = ‘TRUTH’.
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