I think Feynman also identified how rationalizations due to schedule or political pressure were creeping in to safety assessments. When o-ring erosion was init

I think Feynman also identified how rationalizations due to schedule or political pressure were creeping in to safety assessments. When o-ring erosion was initially found they examined it and claimed that since the burn through was x%, that implied they still had y% of "margin" and used that to justify continuing flights. But this was never how the o-rings were designed to operate, 0% burn through is what was expected and now they were using engineering safety margin as operational margin, on a process (burn through) that was not fully understood.