Re: Ki energy defined
I think the ki war has pretty much been put to rest, at least within the boundaries of the scope of this thread. Ki is not a force, a power, or an energy. Those are things which are observable (in the scientific sense of the word) and quantifiable. Ki cannot be observed (again, in the scientific sense of the word) and cannot be quantified, therefore it is not a force, a power, or an energy. What's more, the list of forces, powers, and energies available to the human body is pretty well established.
No one in this thread is arguing against visualization, mental models, mind/body coordination, etc. and no one in this thread is trying to strike the word ki from the aikido lexicon (though I confess I never use the word myself, except in conversations like this).