Some observations and related questions, Alan;
1. If you are correct then the neurologists and psychologists who study the likes of consciousness must be on a loser unless they factor in supernatural agency as part of the explanation - so, do they?
2. If you are correct then religious organisations, such as the RCC that you belong to, would be supporting research that looked at supernatural interaction ('souls') with human biology - so, do they?
3. If 'souls' interact with human biology as regards conscious awareness and decision making if, as you claim, 'souls' are 'God-given', then how do these 'souls' operate in children and young people as they mature as people?
Just as a small add on to the shirt tail of this post of your's Gordon, my wife as well as other close relatives of mine that are well qualified in the area of psychology and they have all commented at various times about the same thing that psychology becomes a very fraught subject for anyone that has a strong religious belief.
It's not my subject so I can't give detailed examples of the problems these people have when studying psychology to gain their qualifications.
I can only pass on the things I repeatedly hear said where religious believers often dump their religious beliefs based on the conflicts they come across during their studies of psychology, some pass up on the courses presented because of the challenge psychology presents to their long held beliefs and the odd few that hang on in spite of the conflict psychology presents to their beliefs, I wouldn't know how that last lot manage coming to terms with their beliefs and psychology?
Having said the above it's always, virtually to a person, studying psychology gives a really strong challenge to religious believers, and that lot's from the horses mouth, direct from well read psychologists.
All power to your post Gordon.
Regards ip[py