Given scene/plot descriptions from movies or TV shows, and given a specific question about the scene, summarize the question into a title
Q: In Wall-E, when EVE returns a little plant back to the spaceship, a plan is shown telling humans to go back to Earth. How can they know Earth is safe based on one little plant? Can one plant represent that an environment is healthy and safe?
A:
How can the Axiom computer know Earth is safe based on the one little plant EVE found?