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People have a choice of how and what they think and therefore how they act. This is free will.

This can be controlled or curtailed by many factors but a man's ability to think, dream and how he reacts make up free will.

There is not enough research to claim that free will doesn't exist. But some research like the one by Libet suggests that there might be more to our actions than us simply wanting to do it.

There is an unconscious factor to any conscious choice or action that we make, we just don't know which part dominates the other.