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.
One of my favorite definitions of “hacking” is the creative reuse of tools for new and unexpected purposes. Hacking is using your email account as a hard drive, using your bicycle seat to open a beer, using Minecraft’s red bricks to create a calculator in the game.
The opposite of hacking is marketing. Marketing tells you that this particular non-stick pan is the pan you’ll use to make omelettes, and you’ll do it in the morning dressed in fashionable clothing in a nice kitchen. It includes a photo and inspirational copywriting to drive this home. Marketing dictates a style, context, and purpose for even the most general-purpose products. This narrative needs to be specific so that you can readily imagine it: it’s you, in an Airbnb, laughing with friends.