Regarding "free will" there is a simple experiment:
Sit on a chair, both feet on the ground.
I want you to lift one foot, and it doesn't matter which one.
Think it over... Which one will you lift?

And when it has been lifted, was that because of:

1. free will
2. determinism
3. choice
4. god's choice
5. god playing dice
6. habit
7. I don't know
8. I don't care
9. none of the above
10. all of the above