No free will in causality.

Free will necessitates lack of causality. Otherwise any act would be just a consequence of previous events. But since causality is absolute. Free will is an illusion, an act of choice with predetermined outcome. Unless an tool is used which is not affected by causality, so that no previous events can determine its outcome I.e a coin. And hence the chain of cause and effect is broken, no matter of how many butterflies flap their wings anywhere the hurricane is stopped by a coin.