The term 'free will' is too simplistic. It tells us nothing about human behaviour or the decision making process.

We are what we are through a complex interaction of genetic makeup, life experiences, social and cultural conditions, sets of likes and dislikes developed over time, and it is from this foundation that convictions are formed and decisions are made.

Put simply, if you are not convinced that something is true you cannot just decide through act act of will that you are convinced that it is true.

Free will is just an excuse used by some when comes to matters of faith. Pascals Wager also fails for many reasons.