One use of the term refers to a genre of writing, generally based on the concept of taking the current world and projecting into the future with some added "scientific" rules.

Another use of the term refers to a disbelief on the part of the
user that something is going to occur - ''Cloning of humans is just science fiction.''

''23jan03 [jcw] - Might I suggest that we try to restrict ourselves to more or less Tcl-specific pages on this wiki?  There's a "wikipedia" [http://www.wikipedia.org/] for such issues, and there are dictionaries [http://www.dict.org/] and open directories [http://dmoz.org/] which can do a far better job for general content...''