Dashiell Hammett

The thrill of a photo-realist painter is if you get really close to the painting, it looks just like a photograph. Whereas in my case, if you get close to my paintings, they totally fall apart - so I'm about as far from a photo-realist as it gets.

The historical novelist has to consider what has actually happened, while the SF writer is dealing in possibilities, but they are both in the business of imagining a world unlike our own and yet connected to it.