‘‘I consider most of my work science fiction, even the stories that look like fantasy. To me, what makes a story science fiction is not whether the universe has the same laws as our universe or not, but whether it is a universe in which the scientific method works. That is a more interesting distinction for me. By that criterion, ‘Exhalation’ is a science fiction story, even though its universe bears no resemblance to ours. The same is true for ‘72 Letters’, and for ‘Tower of Babylon’.
‘‘’Exhalation’ is about conceptual breakthrough (to use the term from The Science Fiction Encyclopedia). It’s a way of describing scientific discovery and the experience of gaining a greater understanding of the universe. Recapturing the experience of conceptual breakthrough, dramatizing that, is one of the things science fiction is good at. You can just as easily do that in a completely made-up universe with a totally different set of physical laws. The underlying process is the same, and I still think of it as scientific investigation.”Read the complete interview, and biographical profile, in the July 2011 issue of Locus Magazine.