we can never repeat an experiment, just hope that results are
the same the second time or third time or whatever. When it
comes to people? The complexity level is too great.
Insurmountable? Probably not someday, but the river keeps moving
forward as it were, and we're never in the same place/time
twice, so results will always vary. If we could freeze time,
these questions might work.
But since we can't, free will works. What doesn't appear to be
free will is habit, thanks to hysteresis of the system.