Abstract

Metaphysical inquiry is indebted to the sceptical dialectic for the earlier moments in its investigation. Through that dialectic the field is cleared of the dubitable. We shall here install Descartes' first Meditation as the initial moment in our program. What if all is a dream? Hume supplies our second moment. Immediate experience, such as sensations of color, is undeniable, and that alone. Our third moment is the familiar retrenchment of Hume to a solipsism of the present instant. The past, like the external world, being removed from our direct perception cannot be verified.