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Would you push one person in front of a train to save a larger group of different people? If you answer yes, then you may be a psychopath. The key difference between a psychopath and average person's brain is their ability to make a decision in a personal dilemma. The emotional part of a psychopath's brain has a neural curfew which limits them from thinking twice about ending one person's life to save others. Science Insider tells you all you need to know about science: space, medicine, biotech, physiology, and more. Subscribe to our channel and visit us at: http://www.businessinsider.com/science Science Insider on Facebook: https://www.facebook.com/BusinessInsiderScience/ Science Insider on Instagram: https://www.instagram.com/science_insider/ Business Insider on Twitter: https://twitter.com/businessinsider Tech Insider on Twitter: https://twitter.com/techinsider