To study what a baby knows, you can't ask your questions.

你不能用提问的方式,去研究婴儿知道些什么

耶鲁公开课 - 心理学导论课程节选

And a baby being raised in France or a baby being raised in Russia knows enough to tell what's his language and what isn't.

在法国长大的孩子,或者在俄罗斯长大的孩子,完全能够区分出什么是他的语言,什么不是

耶鲁公开课 - 心理学导论课程节选