Are our lives completely predetermined?

[Kit-]

Originally Posted by Could_Strife007

I guess this brings up the issue that this predetermination theory is also based on the idea that all motion is potentially predictable, not that we can actually predict it.

Heisenberg's Uncertainty Principle states that the product of the uncertainties which result from measuring position and momentum by any method must be greater or equal to half of Dirac's constant, meaning that it's not even potentially possible to predict their motions exactly.

Originally Posted by Could_Strife007

But if we were to "zoom in" and see how the photons interfered with each other, would there not be a way to potentially predict their motion?

No, see above.

Originally Posted by Could_Strife007

And if the 'double slit' experiment produces the same result each time, is that not predictable motion, even if the result is a probability function?

That was just experimental evidence in case people decided to say "lol heisenberg what a load of bunk."