Commentator: Human behavior cannot be fully understood without inquiring into nonphysical aspects of persons  As evidence of this, I submit the following: suppose that we had a complete scientific account of the physical aspects of some particular human action -- every neurological, physiological, and environmental event involved
Even with all that we would obviously still not truly comprehend the action or know why it occurred
It concludes that a proposition must be true merely on the grounds that it has not been proven false.