Revolution, Constructivism, Experimentalism

Kant's theory of Knowledge is often characterized as 'Constructivism', because its objects are the products of an organizing of raw sensory material by a priori mental structures.  Accordingly, Constructivist a priori knowledge includes the structural features of objects that are the mind's own contribution, in contrast with the status of such knowledge in the theories of Kant's Rationalist and Empiricist predecessors.  Now, it is the first appearance of Constructivist insight that Kant characterizes, in the Preface to the B edition of the 1st Critique, at B xi, as an intellectual "revolution", which he attributes to an anonymous ancient Egyptian thinker, and of which the Copernican innovation is a special case.  But, furthermore, that appearance is, more precisely, an "experiment", as Kant puts it, at B xi.  Hence, the fundamental 'revolution' that is the main theme of that preface, is the emergence of the experimental method, which is why the inscription that precedes that Preface is a quote from Bacon, the father of modern Experimentalism.