霍金：如何知道我们是生活在梦里还是真实存在？曾经一度以为霍金教授来新浪微博开设官方账号只是一个友好姿态而已，没想到大神本尊真的会很认真的回答网友的留言，来，一起看最新的这一条
Thank you for all of your fascinating comments and questions! I appreciate the opportunity to correspond with my friends on Weibo.
A question from the comments:
"There is a story about an ancient Chinese philosopher, Zhuangzi. Zhuangzi dreamt of becoming a butterfly. And he wondered if he was a man who dreamt of being a butterfly or a butterfly that dreamt of being a man. Prof. Hawking, how do we know if we are living in