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 fails to indicate whether the speaker is aware of any evidence that could undermine the conclusion.