There were two ways one could make clones.
The first method was where you refined a dead body to become your clone using a piece of your soul.
One's soul couldn't become united with the dead body completely, since that wasn't your body, Alex knew he wasn't that.
Which was why he believed himself to be the second type of clone. One that was made using various resources, that had a soul grown in it, even without using the owner's soul.
This made controlling the new clone very hard, but not impossible.
However, Lady Ren was saying that it was impossible for him to be the second type of clone as well because of the resources that would require to make his body.
Then… was it really true? Was he really… not a clone?
If Lady Ren had exaggerated the requirement for a body such as his by hundreds of thousands of times, it would still fall short of the number of players that would have to be cloned in this world.