Imagine a thought experiment where we can literally rewind time to a previous moment and recreate the circumstances of a decision perfectly. Now suppose the following pattern appears:
If we rewind by one second, we almost always make the same choice.
If we rewind by one year, we are less likely to make the same choice.
If we rewind by a decade, we are even less likely to repeat the choice.
We do not assume this pattern is true in reality — only that if it happened, it would reveal something important about how choice works.
The meaning of such a pattern would be this:
1. It would show that choices depend on the entire path that led to the moment.
If a one-second rewind produces the same choice, it suggests that nothing significant changed about the person in that tiny time interval — the same thoughts and desires were already unfolding. But if a one-year rewind makes a different choice more likely, then the history leading up to the decision matters. Rewinding changes the psychological path, and therefore changes the outcome.
The further back you go, the more the life-path diverges, and therefore the more the resulting choice diverges.
2. This would imply that “the ability to choose otherwise” does not belong to the moment, but to the whole history.
Traditional free will says:
“At the moment of choice, I could have done otherwise.”
But the thought experiment shows:
“Whether I act differently depends on how far back my life’s path has changed.”
This would mean that the power to “choose otherwise” is not a special freedom inside the instant. It is simply a function of how much the prior causes have changed.
3. It would imply that choice is path-dependent, not freely independent.
If the likelihood of a different choice increases the further back we rewind, then choices behave like the end point of a long causal chain. Change the chain enough, and the end changes. Change it very slightly, and the end stays similar.
This is how deterministic systems — not libertarian free agents — behave.
4. It would undermine the classical test for free will.
The classical test says:
“Could the person have chosen otherwise given the exact same circumstances?”
But in this scenario, the result depends entirely on how much of the past we rewound, not on a free choice from the same initial moment. This shows that the test cannot tell us whether free will exists, because:
Same choice after a short rewind does not disprove free will.
Different choice after a long rewind does not prove free will.
The outcome is fully explained by how much of the person’s life history we changed.
5. If the pattern existed, it would strongly suggest determinism with sensitivity to initial conditions.
It would be very similar to chaotic systems in physics:
small changes in initial conditions → similar outcomes
big changes → very different outcomes
If the further back we went the more likely we were to choose differently, then choice would look less like a free power and more like a result of life-trajectory.
Conclusion
If rewinding further back in time made a different choice more likely, this would not reveal free will; it would reveal dependence on prior causes. It would show that the moment of choice is not a free space where multiple outcomes are equally possible, but the endpoint of a history that shapes the decision. Free will could not be tested by replaying the moment, because variation in choice would come from changes in the path, not from freedom within the moment.
APPENDIX: Does Free Will (as Usually Understood) Rest on Arguments from Ignorance?
In many common and religious versions of free will, the answer is yes: the belief depends heavily on arguments from ignorance. These arguments fill explanatory gaps with “free will” simply because we lack a complete causal picture.
Here is why.
1. “We don’t know the cause, therefore it was free.”
When people cannot identify the psychological, biological, or environmental causes behind a choice, they often declare:
“That means I freely chose it.”
But not knowing the cause is not evidence that no cause exists. It is just an information gap. Filling that gap with “free will” is an argument from ignorance.
2. “It feels like I could have done otherwise, therefore I could have.”
The sense of possibility is not proof of actual metaphysical freedom.
It simply shows that your brain generates multiple imagined outcomes.
The leap from “I feel like I could” to “I truly could in reality” is unsupported
— another argument from ignorance.
3. “The system is too complex to predict, therefore it’s free.”
Human psychology is immensely complicated. But complexity ≠ freedom.
Saying a behaviour was “free” just because it cannot be measured or predicted is
again an appeal to ignorance.
4. “If science can’t track inner motives, they must be uncaused.”
Hidden motives, subconscious desires, wiring we don’t understand — these are
often treated as evidence that choices are uncaused.
But invisibility of causes is not absence of causes.
5. “You can’t prove determinism, so free will must be real.”
This directly relies on the fallacy:
“We can’t prove X, therefore not-X must be true.”
But both determinism and libertarian free will need evidence; neither gets to
win by default because the other hasn’t been proven.
Where Your Time-Rewind Thought Experiment Fits In
The thought experiment shows how any outcome can be interpreted to protect free will:
If rewinding 1 second produces the same choice, defenders say:
“Free will chose the same outcome.”
If rewinding 10 years produces a different choice, they say:
“Free will chose differently!”
Both incompatible results are used as “proof.”
That is a classic sign that the belief is not evidence-based — it is protected
by arguments from ignorance.
The theory survives not because of good data, but because it fills every gap with an unfalsifiable freedom.
Conclusion: Yes, Free-Will Theory Often Rests on Arguments from Ignorance
When the explanation for an action is missing, unclear, or complex, free-will defenders frequently insert “freedom” as the cause. This is not evidence; it is the absence of evidence re-labeled as proof.
So in practice, free will as commonly defended rests heavily on arguments from ignorance — especially the assumption that unexplained or unpredictable parts of human behavior must be “free.”