(NYC)
One of my Cru campus ministry leaders, when I was an undergraduate at Northern Illinois University, was Stewart Goetz (along with William Lane Craig). I am so thankful God placed me in such a high-powered intellectual environment. (Add John Peterson to this environment, too.)
Stu is a brilliant theistic philosopher, the author of many publications, to include his commentary and critique on metaphysical physicalism in Naturalism.
J. P. Moreland cites Stu's argument for the existence of the soul. Here it is.
"Stewart Goetz has advanced the following type of argument for the nonphysical nature of the self, which I have modified:
(1) I am essentially an indivisible, simple spiritual substance.
(2) Any physical body is essentially a divisible or complex entity (any physical body has spatial extension or separable parts).
(3) The law of identity pertains (if x is identical to y, then whatever is true of x is true of y, and vice versa).
(4) Therefore, I am not identical with my (or any) physical body.
(5) If I am not identical with a physical body, then I am a soul.
(6) Therefore, I am a soul."
From Moreland, The Soul: How We Know It's Real and Why It Matters (pp. 118-119).
I'll be presenting this argument in my Faith Bible Seminary class in October.