Magellan's Jew was left on the main land because his directions were obviously wrong and Magellan could not circumnavigate the world with faulty directions.
When you fail at something in life (eg. failing an exam or not getting a job), go home and spend an hour just standing in the shower, propping yourself up against the wall with your eyes on your feet.
Caleb knew the only thing to do after he didnt get prefect was take a failureshower.