Number 15 (Story #4), January 3, 1991 by Phillip F. Schewe and Ben Stein THE PREDICTIONS OF QUANTUM MECHANICS may sometimes seem bizarre or counter-intuitive, but in experimental tests they take precedence over such seemingly commonsense notions that physical systems may possess properties ("hidden variables") that remain beyond human observation. Two formulations of the "no-hidden-variables" idea---Bell's theorem and the Kochen-Specker theorem---have now been unified into a simpler format by Cornell physicist David Mermin (607-255-9689). (Upcoming article in Physical Review Letters.)