can one soul be duplicated

We all most considered everything that soround what we call cloning
According to scientists about cloning is the animal that cannot produced an identical animal from the host Anima
Cloning Anima through somatic cell muller transfer is simply inefficient. The success rate ranges that for every 1000 tries only one to 30 cloores are made or you can look at it as 970 to 999 faillwes in 1000 tries
That's a lot of effort with only a spaek or return,, why is this? there are some reason :the enuceeated egg and the transformed nucleus may not be combinable