Speculative-fiction

Speculative fiction is a looser term than science fiction, often used to include fantasy. It most notably deviates from science fiction in that it does not necessarily use as central to the plot a definite "what if" question. Science fiction usually uses a hypothesized advance in technology or a hypothesized society differing primarily from the current one in its level of technology as its central device, asking how a given device or world will affect the actions of the characters. Science fiction is generally regarded as a possible future (or possible past), while speculative fiction may use elements not present in the actual world, but only as incidental features. Furthermore, it is not bound to possible scenarios, but may freely imagine scenarios that could never occur.