Philosophy is deeply influenced by a human subjectivity in the context of evolutionary time. The attribute of consciousness is inseparable from the being of all else from which humanity has evolved in time. If, as the premise of Wittgenstein's Tractatus puts it: The world is everything that is the case , then the unconscious presence of that everything in the material ground we stand in with our bodies provides the context for all acts of cognition, irrespective of the method of verification called scientific.