Premise: James Arthur Lovell Jr. (born March 25, 1928) is a former NASA astronaut and a retired captain in the United States Navy, most famous as the commander of the Apollo 13 mission, which suffered a critical failure en route to the Moon but was brought back safely to Earth by the efforts of the crew and mission control.
Hypothesis: Apollo 13 was not on it's way back from a moon mission when it suffered a critical failure.