If Salazar Slytherin foresaw use of Rule 12, a hidden requirement to pass on the knowledge to the next heir in the transfer ritual could explain Harry’s survival. The transfer ritual requiring a later deposit, a checkpoint of the recipient’s state, could explain why Quirrell seems more than how Voldemort has been described—if he does contain multitudes. Or the different instantiation has avoided physical pathologies Voldemort lived with.
If Salazar Slytherin foresaw use of Rule 12, a hidden requirement to pass on the knowledge to the next heir in the transfer ritual could explain Harry’s survival. The transfer ritual requiring a later deposit, a checkpoint of the recipient’s state, could explain why Quirrell seems more than how Voldemort has been described—if he does contain multitudes. Or the different instantiation has avoided physical pathologies Voldemort lived with.