You're not likely to find a remotely reasonable hypothesis, even in the Methodsverse where magic abounds, by which the internal parts of a thinking computation can be damaged by damaging the brain, and yet removing the whole brain leaves the soul capable of internal thinking.

Has your hypothesis that thought remains possible after the whole brain has been removed, in fact, been tested?

EDIT: I read your post as meaning that the "fact" that thought remains possible after a brain has been removed [to be cryo-frozen, for instance] was evidence against a soul.