Conversely, a simple decision might be made based on shared values or explanatory goals. The example of death may be illustrative. After decades of debate, a new decision, not a discovery, was made. Physicians concluded the irreversibility of death was the most important property for their purposes. They adopted the concept of whole-brain death as their operational criterion (DeGrazia 2016). The facts on the ground did not change, but the shared understanding did.