But the hypothetical scenario could never be proven one way or the other because it is not possible to turn back time.
It is however, and important thought experiment because it exposes your silly avoidance of the point. If time was rewound, then everything, including the state of your 'soul' (assuming for a moment that you have one) would be the same - so if you cling to the notion that you might choose differently, you can only be doing so randomly. If not, then you (including your soul) are fully deterministic.