I disagree with this position. When a negative (angry, depressed, etc) person approaches an infant, why does that child begin to get upset and cry? When you are driving and turn your head to see the person staring at you, what were you responding too? You walk into a room filled with people whom you never met before and you know instantly what the "vibe" in the room is and who you want to approach and who you don't want to approach-> what is happening? Most communication is non-verbal. There are countless examples of similar experiences. What is so hard to believe that this non-verbal communication is energy-based. I view this energy as "Ki"-> life energy. How this "Ki" can be used in a martial paradigm is a valid question. I think that you are simply tossing the baby out with the bath water. I would suspect that you do believe in this type of energy as existing. I would also suspect that you are doing your own personal experimentation with gaining some awareness of it's role in your training paradigms. Then again, I could be wrong........
+1 - all very good points on ki outside the martial environment that fall within my model as well.