This critique outlines a number of conceptual difficulties and limitations with their dualistic model. (businessethicsjournalreview.com)
The enormous conceptual difficulties in bringing the various areas of physics into harmony with each other, let alone into a unified theory, suggests that as philosophers we should not be too hopeful in this regard. (religion-online.org)
It is only when we consider an infinite class conjunctively, that is, when we conceive of it as a certain sum total of things, that we get into conceptual difficulties. (religion-online.org)