Muhammed bin Khalf relates that he passed by a door of a governor on which he saw a teacher had positioned himself behind a curtain and was barking like a dog. Meanwhile, a boy came form behind another curtain and the teacher firmly grabbed him. I asked what was going on. He replied "This child does not like to read and when he goes home he never returns. The reason for this absence and truancy is that he has a dog with which he spends a vast majority of his time. I was impersonating his dog so that when he mistakes me for his dog and approaches, I can then take hold of him".