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? Because if you do, in time you will begin to see a difference.
The buses that move out of Helsinki stay on the same line but only for a while, maybe a kilometer or two. Then they begin to separate, each number heading off to its own unique destination. Bus 33 suddenly goes north, bus 19 southwest.
...It’s the separation that makes all the difference, and once you start to see that difference in your work from the work you so admire (that’s why you chose that platform after all), it’s time to look for your breakthrough.
Suddenly your work starts to get noticed. Now you are working more on your own, making more of the difference between your work and what influenced it.