Transection -- various questions

[Moosegel]

Does a doctor know he has transected a hair before he transplants it into the scalp? If he transects a hair, does he throw it away, or try to transplant it?

If a doctor knows he has transected a hair, does he bill you for that hair? Is the number of grafts you pay for equal to the number of grafts that are actually transplanted, or the number that is punched out of the donor area, even if some of them are transected and not viable?

If he is using DHI, in which the hair is transplanted immediately after taking it from the donor site, is there any way for him to know if a hair has been transected? The hair is inside a DHT pen, how can he examine it?

When taking a hair from a dense donor site such as the beard by FUE, is the doctor able to avoid transecting the adjacent hairs? I know the punch is 1 millimeter or smaller, but is that small enough to enable the doctor to extract one hair while not damaging its neighbors?