I have notice they use the term "critical fail" to refer to a failure on quality testing at my job. I have a hunch originates from Dungeons and Dragons, but my girlfriend has pointed out that it is used in aviation as well. Does anyone know when and where the term was first coined?
I expect this term originated in stress-strain experiments, beginning with Hook's Law. A deformation in an object can be restored if the force is removed, a point past the limit of deformation is the beginning of failure, and critical failure is the point at which it breaks. In other words the point of no return.