Here in the UK we have some pretty good ones, Mars Bar, Crunchies, Munchies the list goes on but some of my absolute (bakinginpyjamas.com)
Whether being overweight is an absolute bar to fitness has become one of the most hotly debated questions in exercise science (newscientist.com)
Similarly, while providing for individualized determinations, the IDEA does not contain any absolute bar to retaining students with IEPs from grade retention. (naesp.org)