These were engineers, not lawyers. Engineers understand what an acceptable margin of error or failure is, and whether that line has been crossed. In this case

These were engineers, not lawyers. Engineers understand what an acceptable margin of error or failure is, and whether that line has been crossed. In this case, they answered "no" because they felt the defined threshold for safety of the O rings had been exceeded, and the risk was now unacceptable. In contrast, lawyers freely play with words as if they have no meaning, because they will claim, "In our legal system, justice is the responsibility of the jury. We lawyers merely serve as opposing advocates. Thus we are obliged to confuse and mislead the jury toward our desired ends, using whatever verbiage / argument best serves our client." That's why I'm an engineer.