Call it free will, or the indeterminacy principle, or whatever-it is purely a matter of your personal worldview.

Absolute chance, a possible implication of quantum mechanics and the indeterminacy principle, implies a lack of causality.

For instance, Heisenberg's indeterminacy principle has been held to be a reason to reject the Law of Excluded Middle.

He could imagine Herbie the Hyena illustrating Heisen-berg's indeterminacy principle.

(See Heisenberg's indeterminacy principle.)

So the very idea of what Heisenberg preferred to call the "indeterminacy principle" (usually known as the uncertainty principle) was hiding in Heisenberg's original equations.

Since the indeterminacy principle was his father's work, Heisenberg's position that the physical universe is no longer determined and that nature is inherently unpredictable comes as no surprise.

In a later book, Nature: Cosmic, Human and Divine (1929), Simpson argues that religion results from the confrontation of Mind with the Infinite Energy of the universe as suggested by Heisenberg's indeterminacy principle.