Japanese martial arts generally come in 2 forms. -do (the way) and -jitsu (the art). -do forms are about self improvement, -jitsu forms are about effectiveness.

Japanese martial arts generally come in 2 forms. -do (the way) and -jitsu (the art). -do forms are about self improvement, -jitsu forms are about effectiveness. You can see this with judo and jujitsu. Carmac is clearly aware of this difference as he says: "We aren’t there yet, but carefully writing code completely by hand is moving from a -jitsu to a -do. " IIRC Carmac has done judo (I'm not sure to what level).