Abstract

Paul Gilbert has written a fascinating, stimulating book, one that offers a strong challenge to whoever might believe that the progress of scientific thought has rendered classical metaphysics obsolete, meaningless, or worthy only of historical scholarship. His work, based on the notion that a modern experimental science such as physics is not chiefly grounded on empirical evidence, is quite contrary to that naive empiricist conception already in jeopardy owing to Heisenberg's uncertainty principle and the present day prevalence of statistical explanation. Physics' distinguishing trait is, in fact, the mathematical form given to its laws. However, mathematics is still awaiting a solid and complete foundation since Gödel's incompleteness theorem and the failure of Hilbert's metamathematical program. Such foundational difficulties are no surprise to Gilbert. Like those encountered by modern science's metaphysical predecessors, such difficulties are necessary consequences of the insuperable gap between reality and its discursive representation, between the unity of being, the multiplicity of its sensible appearances, and its analytical and synthetic reconstruction in thought. They reflect the "ontological differences" and conceptual separations that can be properly reunified only in action and not in words, that is, by means of a specific human action performed mentally when one is thinking that he is effectively thinking about something. Now, this type of solution is of course precluded by the prevailing quest for "objectivity" or "knowledge without a subject." For Gilbert, there can be no such thing as knowledge that is not animated by a subject's desire to fulfill the need to know, by doubts and astonishment at the recognition that reality is far more complex than its sensible appearances by which one immediately conceptualizes it. Even one's emotions, passions, freedom, the will to transcend oneself, to build a viable society, and to join with others while respecting their otherness must be taken into account. Any solid foundation for human knowledge must then encompass an ethical dimension. This is the major conclusion which the author wished to arrive at in this book and which had to be established first, before proceeding to the ultimate foundation aimed at by metaphysics.