Castoriadis's continuing reflections on science were critical in paving the way for a new reflection on physis and the creativity of nature. During the 1980s, Castoriadis's epistemological reflections went beyond his discussion in The Imaginary Institution of Society to relativize further the claims of science. His approach to the epistemological and ontological status of science was distinctive, in that it simultaneously freed up a space for philosophical reflection, in general, and on nature, in particular. He argued that science not only provided knowledge about nature, but that it also presumed a philosophy of nature. Three questions informed his discussion: First, how must the world be in order for a particular kind of objective knowledge to be possible? Second, how must the world be in order for a non-cumulative history of science to exist? Third, what is the relation between imagination, knowledge, and truth?