丹麦数学家兼物理学家皮亚特·海恩的一首名为《一个心理学小建议》的诗：

Whenever you’re called on to make up your mind,
and you’re hampered by not having any,
the best way to solve the dilemma, you’ll find,
is simply by spinning a penny.
No–not so that chance shall decide the affair
while you’re passively standing there moping;
but the moment the penny is up in the air,
you suddenly know what you’re hoping.

海恩在诗中写道，当面临两难的困境、不知该如何抉择时，就把一枚硬币抛向空中。然而，这并非是让偶然的命运来替你做决定。而是硬币腾空而起的那一瞬间，便突然明白了自己的渴求。