You beat me to it JD
synopsis of the short story below.
This particular story deals with the development of a computer called Multivac and its relationship with
humanity through the course of seven historic settings. The first is set in the year 2061. In each of the first six scenes a character presents the computer with a question, namely as to how the threat to worthwhile continued human existence posed by
heat death can be averted. As the characters in the story recognize, the question is equivalent to: "Can the
second law of thermodynamics, used in the story as
entropy, be reversed?" In each case the computer finds itself unable to reply due to "insufficient data for a meaningful answer".
In the last scenes, the god-like descendants of humanity watch the universe finally approach the state of
heat death and ask the Cosmic AC, Multivac's descendant, the question one last time before it merges with "Man." Cosmic AC is still unable to answer, but continues to ponder the question after space and time cease to exist. Eventually the Cosmic AC discovers the answer, but has nobody to report it to; the universe is already dead. It therefore decides to show the answer by demonstrating the reversal of entropy, creating the universe anew; the story ends with AC's pronouncement, "
LET THERE BE LIGHT!" And there was light—"