To me, it just means that a human could theoretically make a decision that is completely free from the influence of inherited behavior or the learning experiences gained from his prior environment.
In that sense of the term, I highly doubt that free will is really possible for a human in ANY circumstance.
Any choice that is not coerced is a choice don't FREE of coersion, no?
Our environment and upbrining will influence our choices yes BUT not to the point that those choices are dictate by something OTHER than our choie to choose.
One may be born into a JW family and be raised as a JW YET, it is pure choice to remain one.