Well, Gill it' been fun learning stuff. It's why I participate on this forum-to learn. I am interested in evolution, the properties of light and of neurons.
Biology, Neuroscience and physics explain these things very well, and satisfactorily answer most of my questions. I never feel a need to make something up to fill in the gaps in my understanding.
The problem is, unless you can explain a mechanism by which an immaterial substance acts upon the material, we'll get nowhere in these discussions. At least I won't be persuaded that this immaterial substance exists. And if you can show me that it acts upon the material world it would not be immaterial. I guess that's why you use the term immaterial substance. Something that is and is not.
If consciousness is not immaterial substance than it is material substance and we can then observe it, measure it and test it.
Now we can search for the origin of the electrical potentials in covalent bonds next, I suppose. Then we would have to go deeper into quantum electrodynamics to understand that. However, I am not convinced that you would accept any facts as evidence that your idea(s) is/are wrong since as you say, it comes down to philosophy. Besides, you haven't seemed to be able to accept that you have been wrong on a number of things throughout this thread from my (and others) perspective.
So, I think I'm opting out of this one and seriously considering weather or not it is a good idea to engage you at all. I work very hard at trying to understand someone's pov and the subject matter discussed. It needs to be reciprocated.
I'll offer this last little tidbit: It's hard work, but take control of your rational mind. If our parents, relatives, friends, teachers and authority figures didn't already indoctrinate us with their beliefs, myths and superstitions, we would have created our own. When others don't make up stories, we make up our own. It's what we do. We are hard wired for it as part of a survival mechanism. More of our brain real estate is dedicated to processing our imagination than our reasoning. Our limbic system (thalamus, hypothalamus, amygdala, and hippocampus) overrides our frontal lobes and overpowers our rational mind. The brain's center for reasoning is the last to mature in a teen. Faith trumps reason any time...But take control of your rational mind.
There 's no need to make up immaterial stuff when material stuff is so interesting.