 Far from being “doomed to succeed”, simulations fail quite regularly in several important ways (Grim, Rosenberger, Rosenfeld, Anderson, &amp; Eason 2013). Two standard forms of simulation failure are failure of verification and failure of validation (Kleijnen 1995; Windrum, Fabiolo, &amp; Moneta 2007; Sargent 2013). Verification of a model demands assuring that it accurately reflects design intention. If a computational model is intended to instantiate a particular theory of belief change, for example, it fails verification if it does not accurately represent the dynamics of that theory. Validation is perhaps the more difficult demand, particularly for philosophical computation: that the computational model adequately reflects those aspects of the real world it is intended to capture or explain.