Quotes: Defining sf (humor)

All from Ansible, #255 (October 2008):

1. "sf was genre for those who can't find girlfriends."
2. "sf is for folk who want to explore brand new worlds while failing to understand there's one here that they're living in now."
3. "Julian Clary in turn challenged, and gave as an e.g. of sf Mr Gobbledegook walking down the road and turning into a frog: Paul Merton challenged for deviation on basis that wasn't sf, though would have been if Mr Gobbledegook had turned into a spaceship."