The story, “Null-P.” by William Tenn speaks of the perfectly average man, right at the center of the population bell-curve. In “Conservation of Probability”, Brook West explores the other end, creating a short magic realism story where one woman, Kendra, inexplicably becomes the axis mundi of black-swan events.

Kendra believes it is because she has mastered some form of telekinesis, concentrating the power of her mind to bend the laws of probability and chance. Practising on dice, she first achieves success in her kitchen rolling 23 elevens in a row. From there, she tries her mind at executing tougher and tougher improbabilities, on the way bankrupting 13 casinoes in Las Vegas. She does not realize that every time she performs such statistical flukes, other very unlikely events also take place - multi-plane collisions, meteor and lightning strikes, misers becoming generous, “teachers’ union settling without strike”, children “doing dishes without being asked” and most comically, “the chairman of the university mathematics department refused to compute the odds”. By the end of it:

It is not clear why the author calls all this a “conservation of probability”, except to think that she somehow is thinking of “left-tail events” and “right-tail events” on the normal curve (which would still leave the question of why her events are on one side of the probability distribution and the rest on the other). But anyway, there it is...