“The cobalt 60 nucleus is said to spin counterclockwise if you look down on its north pole, but that description by itself is circular because "north pole" is simply what we call the end of the axis from which a rotation looks counterclockwise. The logical circle would be broken if something else differentiated the so-called north pole from the so-called south pole. Here is the something else: when the atom decays, electrons are more likely to be flung out of the end we call south. "North" versus "south" and "clockwise" versus "counterclockwise" are no longer arbitrary labels but can be distinguished relative to the electron spurt. The decay, hence the universe, would look different in the mirror. God is not ambidextrous after all.”