The primary thing when you take a sword in your hands is your intention to cut the enemy, whatever the means. Whenever you parry, hit, spring, strike or touch the enemy’s cutting sword, you must cut the enemy in the same movement. It is essential to attain this. If you think only of hitting, springing, striking or touching the enemy, you will not be able actually to cut him.
The McNamara fallacy, named for Robert McNamara, the US Secretary of Defense from 1961 to 1968, involves making a decision based solely on quantitative observations (or metrics) and ignoring all others. The reason given is often that these other observations cannot be proven.
The fallacy refers to McNamara's belief as to what led the United States to defeat in the Vietnam War—specifically, his quantification of success in the war (e.g., in terms of enemy body count), ignoring other variables.
Kasuri is thus a textile that appears to have been rubbed. Since the edges of the pattern do not align, they take on the nature of an odd number rather than an even number. Without this rubbing or smudging, kasuri could never have been. However, since it is precisely this misalignment and blurry effect that is the source of kasuri’s beauty, we are presented with an interesting problem. I will call this problem ‘the beauty of odd numbers’.
The beauty of kasuri is received as a gift. As long as the laws of nature are upheld, the beauty of kasuri remains intact. This demonstrates the curious principle that the artisan is deprived of technical freedom but works in the freedom of nature.
In this sense, kasuri can be said to be created in a state of freedomless freedom.