When electrical pulses are applied to the ventral tegmental area of their brain, macaques presented with two images change their preference from one image to the other. The study is the first to confirm a causal link between activity in the ventral tegmental area and choice behavior in primates. (1)

My dogmatic atheist friend,

Free choice is a matter of… choice.

You can see everything as caused by something else.

And they will always be like this.

Until you decide to become on of those “things” which cause things…