Safety cut rope axe man In the first nuclear reactor, constructed by Enrico Fermi in 1942 under the bleachers of the University of Chicago football stadium, the control rods were held up by a manila rope. A man with an axe was told to cut the rope if the reactor got out of hand. This "safety cut rope axe man" is supposedly the origin of the term SCRAM for an emergency shutdown procedure. Brian Hayes, Infrastructure: A Guide to the Industrial Landscape wordsacronymsenergy
Thinking is a matter of degree Perhaps “thinking” is not a yes/no thing, but maybe it is a matter of degree. Richard Hamming, The Art of Doing Science and Engineering: Learning to Learn I Am a Strange Loop cognition