![riddle school 3 what happens if you beat it twice riddle school 3 what happens if you beat it twice](https://static01.nyt.com/images/2021/06/20/magazine/20mag-father/20mag-father-superJumbo.jpg)
Let's assume that there just 2 children: Alice and Bob. Hereafter, the custodian starts to count and after every stroke, every muddy child has an opportunity to step forward. A custodian tells the children that at least one of them has a muddy face. But, every child knows the state of all other children's faces. None of the children can determine the state of their own face themselves. The children consider it possible to have a muddy face.