Paradigm Shift Harry Potter Goes to School: Learning In and Out of Hogwarts

After at least six months of believing that Severus Snape is trying to
steal the Sorcerer’s Stone for himself and then adjusting that to believe
that he’s trying to steal it for the Dark Lord, the puzzle pieces of
Harry’s belief system are dramatically rearranged. We are a lot like Harry.
In real life, when we’re confronted by evidence that we have been really
wrong about something, it’s really hard.