"The rules just kind of got there. They don’t make any kind of sense except in terms of themselves. But when you start to exercise those rules, all sorts of processes start to happen and you start to find out all sorts of stuff about people. (…) It’s just a way of thinking about a problem which lets the shape of that problem begin to emerge. The more rules, the tinier the rules, the more arbitrary they are, the better. It’s like throwing a handful of fine graphite dust on a piece of paper to see where the hidden indentations are. It lets you see the words that were written on the piece of paper above it that’s now been taken aways and hidden. The graphite’s not important. It’s just the means of revealing the indentations."
Douglas Adams. The Hitchhiker’s Guide to the Galaxy - A Trilogy in Five Parts, p. 618. (From the last book, Mostly Harmless)
This, for me, is pretty much the perfect definition of what Design Fiction is about.