Abstract

Aristotle's thesis concerning the primacy of the ontological question did not, however, remain uncontested. For the concept of being becomes meaningless if only the being of the particular is admitted. The nominalistic repudiation of ontology, whereby the concept of being is reduced to a mere flatus vocis, runs through the history of philosophy since the medieval controversies around the problem of universals. But Aristotle's thesis could be questioned without adhering to the nominalistic definition of reality as a mere summation of particulars. Thus transcendental idealism did not oppose Aristotle's ontological starting point on nominalistic grounds but for its inherent dogmatism, and it put the "critical question" in the place of the "ontological question." This shift was particularly important in the development of German Philosophy in the twentieth century. The critical question plays the role of the first philosophy and yields two major disciplines: methodology and epistemology. Critical philosophy did not mean one dedicated to the criticism of existing philosophical doctrines but was envisaged instead as the foundation for a possible system of philosophy. The preparatory function of the critical question was explicitly recognized by Kant, who identified the systematic part of philosophy with the traditional contents of metaphysics, purified, however, of all dogmatic assertions. The critical question did not embrace the entire scope of his philosophical work, and Kant labored to build the system to the end of his life, as the fragments of his Opus Postumum testify.