 Of course, to raise these problems for the Via Negativa is not to deny that there is something right about it. For example, when we think of properties that would falsify physicalism we do often think of *certain* mental properties, e.g., the distinctive properties of ectoplasm or ESP. However, this fact—that certain mental properties would, if instantiated, falsify physicalism—can be captured without defining the physical in general as the non-mental. A better way would be to require, of any spelling out of the notion of the physical, whether it be the object-based account or the theory-based account, that it respect that fact that some (uninstantiated) mental properties are non-physical.