Skepticism: An inclination to challenge ideas and withhold judgment until all evidence is considered or when evidence is insufficient. It means being able to take a position and change it when sufficient evidence and reasons are presented, and to look at findings from various perspectives. A "healthy dose of skepticism" involves pointing the skeptical finger at one's own ideas for self-reflection.
Challenging and questioning ideas presented to you can not only help you learn all sides of the story, but to create your own opinions based on questions and facts relevant to you, and it helps you learn to not take everything at face value.