"In observational studies, we often have to rely on assumptions that are not directly testable."
在观察性研究中,我们常常不得不依赖于无法直接检验的假设。
I'm not a material girl, I'm a spiritual girl.
I believe that the testing of the student's achievements in order to see if he meets some criterion held by the teacher, is directly contrary to the implications of therapy for significant learning.
Common sense is not so common.