Kiddo, you come across as really pathetic when you attempt to go "e-thug" you know that...? Just for reference - I own four "katanas"; two replica swords, 1 rated as battle ready, and one World War 2 Japanese Infantryman Katana (haven't placed the rank or anything yet - still working on getting it fully identified). I have a small plethora of other blades, including a Wakizashi (which is the pair of my battle ready sword), a machete, and a few other assorted odds and ends, including a Scottish Highland Claymore. Your assertion that you could "slice me up into little pieces" is nothing but foolish puffery - you neither know who I am, what I look like, or what my capabilities are - however, given that you are so quick to become aggressive (and perhaps a tad irrational), I would be willing to reckon that you have NO training in ANY style of martial arts, much less in any style that makes use of a sword. I would, in fact, go so far as to say that you would be more dangerous to YOURSELF with your own blade than you would be to anyone around you. To top it off - you charge me with a sword, and you're likely to get shot... I don't have a license to carry for my health you know (well, technically, it is for my health... given the number of crazies running around... but you get the point). So, get off your high horse, or take your attitude and stuff it. I reassert - in the PRACTICAL SENSE, Ki and Qi are one and the same. Some cultures use Qi as the definition of the Life Force or Spirit instead of just the energy of the body. Evidenced in: Citation - Daniel A. James, "Unraisable body: The physics of martial arts", Sports Health, Autumn 2004, Sports Medicine Australia, Canberra Perhaps a bit of light reading will clear up your confusion, phlogistician?