I did not just assume that an immaterial soul exists. In Post#24 I gave the OP the premises he needs to deduce the conclusion that an immaterial soul exists. Right at the beginning I said: “We are capable of operations or actions that are immaterial or free of the conditions of materiality. Since everything acts according to its nature, an immaterial operation must proceed from a source whose nature is also immaterial, which the soul is.” Since it is already obvious, I let the OP add the final conclusion himself: “Therefore, an immaterial soul exists.” Am I wrong in presuming that the OP is intelligent and can add that conclusion himself?
That’s bad substitution, Freddy. Your pet dragon is not immaterial; it is imaginary. A human soul is immaterial but real, and is the source or principle of the real intellectual operations that produce our universal concepts. An imaginary entity, like your pet dragon, cannot be the source of real operations, but is only the plaything of the imagination. It exists as long as the brain (which is also the seat of the imagination) is alive. Once the brain dies, your pet dragon ceases to exist, which betrays its materiality and intrinsic dependence on matter. It is totally unlike our immaterial soul which, because it is unaffected by changes in the body, will survive the death of the body. Now I hope you understand why I spent some time explaining what the soul does in my Post # 24. In paragraph # 2 of that post I talked about our consciousness as giving us internal and introspective evidence that our soul is unaffected by changes in our body. That is vastly important because it gives us a clue, not only to the immateriality of the soul, but also to its immortality. If our soul is intrinsically independent of the changes that happen to the body, then it also will survive the death of the body.
Read Post #24 again. The conclusion you seek is implicitly there, but if you want to make it explicit, just add at the end of my opening paragraph, where I said “which the soul is,” this statement: "Therefore, an immaterial soul exists." Obviously, if the immaterial soul is the source of the immaterial operations that we make, then that immaterial soul exists. Are you happy now?