Determinism: Philosophical theory that denies the possibility of freedom in human behavior by placing the causes in different fields such as genetics, education, the follow or God giving rise to the biological, psychological, sociological and theological determinism. The paradox of Buridan's donkey would be an example of determinism. We can not possibly demonstrate the existence of freedom but, as the philosopher Immanuel Kant said, conscience demands it and psychological consciousness and the penal code presuppose it.