 But there are additional questions to be asked about which values may be grouped together into token variables. For instance: must the values of a variable concern the same time? Or can a single variable have multiple values which concern different times? Suppose Patricia died on Monday from an overdose of morphine; had she not received the morphine, she would have died on Tuesday. Then, there are several different variables we might try to use when thinking about Patricia’s death. We could use a single variable for whether Patricia died. This variable would take on one value if Patricia died on Monday or Tuesday, and another value if she remained alive throughout Monday and Tuesday. Or we could use a single variable for when Patricia died. This variable would take on one value if she died on Monday, and another value if she died on Tuesday. Alternatively, we could use a collection of time-indexed variables, whether Patricia had died by time t, for some range of times t. As Hitchcock (2012) puts it: the question is whether Patricia’s dying on Monday and Patricia’s dying on Tuesday