Edward Feser has presented a lecture on the immateriality of the mind, which is worth listening to:
The papers here and here will flesh out details.
The core logic of the argument pivots on the principle of distinct identity, turned to how distinguishable entities are inherently different. Syllogistically:
1: Formal thought processes can have an exact or unambiguous conceptual content.
However,
2: Nothing material can have an exact or unambiguous conceptual content.
So,
3: Formal thought processes are not material.
Worth pondering as we reflect on this season.
Enjoy the Christmas season. END