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.
A woodworker works along the grain of the wood to prevent splinter. A butcher slices across to the muscle fiber to improve tenderness. A sailor trims the sail to balance the lift and drag from the wind. When we respect the material, the material pays us back in convenience, safety, and efficiency.
Good web design requires the same understanding of and respect for the materials. And that material is the browser, along with its semantic HTML, default styles, and standard behaviors. But the wide use of design software such as Figma, Sketch, and AdobeXD has trivialized the nuances of such material into “canvases” or “artboards” of pre-defined sizes. The convenient styling and manipulation of pixels and objects have disguised the hierarchy of the DOM, the constraints of the device, and the personal preferences and browser setting from real users. Dishonest tools encourage dishonest design.
In the context of web design, Dieter Rams’ principle is not only a resounding criticism against mindless trends and meaningless decorations. It is a humanist reminder to put material honesty and social responsibility above the pursuit of the “pixel perfect” design.