On January 28, 1986, Florida was unusually cold. Near the launch pad the air was close to freezing, and the temperature at the SRB joints was even lower than the surrounding air. Challenger broke apart 73 seconds after liftoff. The Rogers Commission later found the cause: the rubber O-ring inside the solid rocket booster joint had lost elasticity in the cold and failed to seal high-pressure gas at ignition.
I have read this story many times since childhood. Each rereading leaves a different fragment behind. The most recent fragment was this: that morning, the Thiokol engineers already knew. They had data. Below 53°F, the O-ring became unstable. The meeting argued through the night. In the end, one sentence pressed it down: decide as managers, not as engineers.
Feynman wrote the last line of Appendix F like a verdict: “For a successful technology, reality must take precedence over public relations, for Nature cannot be fooled.”
That sentence is often quoted as satire aimed at NASA public relations. On my third reading, I realized it is really an engineer’s law of survival. Nature cannot be fooled. The thing you do not inspect today will return tomorrow under its own physics.
In The Challenger Launch Decision (1996), Diane Vaughan gave this pattern its name: normalization of deviance.
She studied ten years of NASA internal documents and found a cold pattern. Before Challenger, O-rings had shown scorch marks on multiple flights. The first time, engineers treated it as an incident. The second time, it received an engineering note. The third time, it became a “known risk.” The fourth time, it turned into “normal wear within flight experience.” No one decided on a particular day to ignore it. One small concession after another moved “the thing that went wrong” into “the range of normal.”
I later copied this section into my own work notes. Not because it is about NASA. Because it is about me.
I began watching myself.
Everyone who works alone on projects has some version of “waiting for inspiration.” Mine was: let me look through material today and write when the state arrives. Looking through material is not wrong. The problem is that “state” is a thing I cannot define, measure, or predict. It places today’s delivery on a variable I cannot name.
Rocket engineers do not work that way. They have a checklist. Today’s work is to measure temperature, inspect the joint, check propellant pressure, run the ground test. Not “find the inspiration for launch.” They also have judgment, intuition, and creative moments - but those moments happen above the checklist, not before it.
Atul Gawande says something similar in The Checklist Manifesto: a checklist does not replace expertise. It frees the expert’s attention from “did I forget something?” and gives it back to the places where judgment is actually needed.
My translation is this: waiting for inspiration hangs today’s output on an undefined variable; an SOP mindset hangs today’s output on a small action I can control.
In concrete terms, it looks like this.
Every morning I have a checklist of fewer than ten lines. Not “finish an essay today,” but “write one full Markdown page for the essay, regardless of whether it is good.” Not “finish the website,” but “fix three specific type-size issues on the home page.” Not “find inspiration,” but “read the remaining 12 pages of Vaughan’s chapter.”
Each action is small enough that even if my state is bad, my mood is bad, and my head is noisy, I can still do it. That is its value. It turns “did I produce today?” from a psychological variable back into a physical one.
Inspiration is not unreal. Inspiration is what appears while you are inspecting the 47th O-ring and suddenly realize that the nonlinear behavior of rubber in the cold can become a useful metaphor. It appears on top of the checklist, not opposite it.
Writing this, I realize the note itself is one small inspection. Today’s work was to land the thought in a thousand words. Not to wait for “inspiration about inspiration.”
Nature cannot be fooled. What is not written today will not grow by itself tomorrow.