Not possible

I do not believe biology will serve as a answer towards the reasoning as to why we do certain things and think a certain way psychologically. I find it impossible to finding a method mathematically that will show us the definitive time or reasoning as to why someone has done or said or even thought a certain thing. It is a factor that is completely unknown to humans and I believe it will remain that way. Humans are exposed to their own free will, figuring out when someone will do something will remain unknown due to that factor.