Physics and Philosophy - Thoughts on the Implications of Quantum Mechanics, and Other Matters #10vii

10. On Quantum Mechanics:
vii. Classically, in a simple system, if we know the initial conditions of a system, such as its position and momentum, we can determine the entire particle’s future and history. In quantum mechanics, this knowledge is impossible to determine. We may only know probabilities, not absolutes. The world below the level of the Correspondence Principle ceases to be strictly causal, but rather becomes causal and probabilistic.