This is from Dr. Dennis Bonnette on Strange Notions.
Metaphysical Materialism is Simply Untrue
Only an immaterial cognitive faculty, that is, one not extended in space, can actually apprehend the wholeness of any sensed object. Moreover, in the same act, the sense faculty can apprehend manyindividual wholes at once, as in a flock of birds.
How does an immaterial sense faculty unify the object of perception into a meaningful whole? Knowing how an immaterial entity “works” would require knowing how to make one -- something that exceeds human capabilities. Still, I know a sense faculty can do it, because I actually sense meaningful wholes in sensory experience. That is, in a single act, I see a whole moose or experience hearing a complete melody or am aware that I am touching the total surface of a sphere. No purely physical entity can adequately explain this fact.
Sight’s ability to apprehend its object as a whole is sufficient to show that at least one external sense faculty must be immaterial. Because an animal’s sensitive soul is immaterial – that is, because it is not extended in space, even animals can experience the unified wholeness of sense objects – and many such wholes simultaneously.
Purely materialistic metaphysic’s essential problem is that sense cognition’s immaterial nature is what enables the knower to apprehend the physically extended object as a unified whole. In so doing, immaterial cognition achieves something that mere extended matter cannot do, namely, it can unify in a single simple act what in physical reality is extended in space and multiple in parts.
Some materialists admit that certain cognitive acts cannot be expressed in purely material terms. Yet, they insist that these “epiphenomena” somehow “emerge from” purely physical matter. That is, they are simply a product of physical matter in some way. The problem with this explanation is that the more perfect cannot be explained by the less perfect. Or, to put it another way, that which is inherently unable to explain the unity of the whole (discrete physical parts) cannot be a sufficient reason for apprehending the thing sensed as a unified whole.
Moreover, this immaterial principle must explain how unity is achieved from multiple sense data. Since a material entity can never explain the unity of its discrete elements, what unifies must not only be immaterial, but must be something within the sentient organism that unifies its discrete material organs into a functional whole respecting sense perception. Such an immaterial principle would be the form or soul of even the lowest sentient organisms.
This means that a purely materialistic explanation of all reality is simply false.