But now, I want to raise a huge developmental puzzle and the puzzle is there are some ways in which babies are-- not just babies,but young children are very clueless when it comes to people.

但现在我想提出一个发展心理学的难题,这个难题是,当提及与人类有关的知识时,婴儿,甚至是幼儿,在某些方面都是完全不知的

耶鲁公开课 - 心理学导论课程节选