Tom describes a private filtering system he was not aware of building. Anything he had heard described as common got classified as not worth mentioning, and the classification happened silently, months before there was anything to classify.

I had made myself the person who decides what is worth a clinician’s time, and I had no qualifications for that job whatsoever.

The sentence that changed it came from a nurse at a routine review, who told him the triage was not his to do. He describes that as the single most useful thing anyone said to him in eight months.

He is careful to say that nothing he had absorbed turned out to be serious. His point is that he had no way of knowing that at the time, and had been quietly making the call anyway.