I'm thinking of smacking a confession out of the disobedient child.
Are you sure that you should be smacking the child?
I'm doing this for best interest, I want him or her to tell me the truth.
Confession from physical abuse is never a good thing. They will just say whatever you want, just to stop the pain.
I'm sure it will be fine. I will use a reasonable amount of force.
I am not sure that that is the route that you should take. You should not use violence in order to get a confession.