That all sounds very reasonable**, until one realises how presumptuous it all is. Neither of her definitions - that for science fiction and that for speculative fiction - are the standard ones, particularly as the latter is usually thought to encompass the former (as it does fantasy, super heroes, supernatural fiction, and probably lots of other stuff with which she would not want to be associated).
What they are are self-serving, specifically doing duty to make sure that what she writes isn't bundled up with what she believes are fundamentally implausible ("things that could not possibly happen"), and so hers are, by implication (by
her definition), "things that really could happen" (but not yet).
I'm not sure which is worse:
- stating that science fiction is implausible nonsense (all science fiction, because "Verne" books rub shoulder to shoulder with "Wells" books on the shelves of bookshops and libraries and on, say, Amazon), or
- presuming to alter the meaning of words simply to suit her own purposes.
As it happens, her definition of speculative fiction has some currency (if only because she is not alone in running scared from the science fiction label), but she should have left it at that. What is wrong with just saying, "I prefer my books be thought of as speculative fiction, by which I mean works that are set on the solid foundation of science of which we already have a good understanding"?
** - That was what she was saying on, I think, Radio Four's
Start the Week.