The more precisely the position is determined, the
less precisely the momentum is known [and vice versa].
Uncertainty paper, 1927
This idea liberated scientists and artists from a
purely mechanistic view of the universe. Cause-and-effect was
not all. Heisenberg showed that the observer had an effect, disturbed the
outcome. A step away is the idea of the reader as respondent, provocateur
or even fairy godmotherinfluencing the flow of events.