When the class teacher saw that Lillian had stopped, she curiously looked at the man standing outside the gate. She then bent down and gently asked Lillian, “Lily, do you know that man? If you do, nod your head. If you don’t, you can shake your head to tell me.”

After the class teacher had spoken, Lillian neither shook nor nodded her head for more than ten seconds.

The class teacher found this to be a little peculiar. She knew that while Lillian could not speak, she could understand simple sen