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.
Why can't office buildings use doorknobs that are truly knob-like in shape? What is this static modernism that architects of the second tier have imposed on us: steel half-U handles or lathed objects shaped like superdomes, instead of brass, porcelain, or glass knobs? The upstairs doorknobs in the house I grew up in were made of faceted glass. As you extended your fingers to open a door, a cloud of flesh-color would diffuse into the glass from the opposite direction. The knobs were loosely seated in their latch mechanism, and heavy, and the combination of solidity and laxness made for a multiply staged experience as you turned the knob: a smoothness that held intermediary tumbleral fallings-into-position. Few American products recently have been able to capture that same knuckly, orthopedic quality.