Find this thread interesting, not just the recent argument, but my earlier post when I was doing ninjutsu and whether the same applies now with judo. To some extent it does. I feel the real difficulty in ninjutsu was trying to learn the feeling of body movement. Teachers demonstrating technique want to show movement without influencing or saying this is the movement. Was Bruce Lee a ninja? Fighting without fighting. There, got my little dig in The only time I have an issue with technique in judo is literally not seeing some of the groundwork like turnovers as standing at one position might be good for part of the movement but not all of it. Teachers who can do a sequence of movements well might not appreciate everyone watching will pick up a technique by seeing, yet I appreciate it's difficult to defy gravity. I remember one class when we first were taught tai otoshi, and several variations, and with switching from left to right I was messing it up but once I thought through the mechanics of the movement, like a rule set then I had it. Then I felt silly at how easy it was. Body shifting and taking balance. I see the crossover in lots of the movement. Not that I've mastered it, needs a lot of practice, lots and lots of uchi komi I enjoy the atmosphere more even if the art seems replaced by sport.