"Hmm… that's unfortunate."
As seconds passed, Alex became aware that he simply had no method of testing whether what he had done would be a success or not.
The memory he had seen of the man who did these experiments first told him that in the book he had read about these experiments, this was how he would succeed.
Only Alex wanted more than just memories from a memory. He wanted factual evidence this would work, but it appeared that it wasn't going to work.
In the end, to figure out if a Spiritual Root transplant worked, he needed to try it out on a living, breathing human being. Only then would the body take in the spiritual root and adapt to it.
Alex was certain to never get a chance to do that, at least not here. He felt horrible even thinking about experimenting with living humans. That was horrible and had been why he had killed the previous man who had done it with children.