When it goes wrong
Four claims about what happens after something breaks. This is where people act on beliefs quickly, under pressure, which is exactly when a wrong belief is most expensive.
Why this section matters most
Every other claim in the register gets considered calmly. These four get acted on within minutes of something going wrong, by somebody who is anxious and short of information. A wrong belief that would cost nothing on a normal day costs a great deal here, and one of the four is the single most damaging item in the whole register.