Say you come up with a new idea, that has no precedence. It is outside the box of social awareness and social acceptability. This leads to the primitive fear of novelty in others. The external pressure is on to bury the idea and speak no more of it; social determinism.
But you decide that the determinism of the collective fear, does not disprove the idea, so you choose to develop the idea in spite of social determinism pushing the other way. Is this free will and if not where did the unknown determinism come from to create something new?
The Bible was among the first to introduce the concert of free will and choice. Adam was considered above the animals but below the Angels. Adam was given the job of naming the animals, without any outside peer pressure. He had free choice to call each species anything he wished. This can occur with the unconscious mind, synthesizing his sensory data and feelings, into a sound, on demand. It is not much different than the scientist using a computer to do the data crunching, on demand, he cannot do on his/her own.
Above the animals meant he was no longer under natural instinct, since if he was under natural instinct he would be just a human animal. What is the next step above the human animal in terms of evolution? It would be someone who is not fully under natural human instinct, but rather someone who was free will to choose these natural humans instinct or not. Again, one would need to self reflect and based on observations, free will allows intern synthesis, on demand, for unnatural choices that can enhance or regress instinct.
The tree of knowledge of good and evil is learned knowledge from culture, which acts in the capacity of social determinism. Instinct starts inside and is not learned or taught. This is an internal determinism; blind impulse. As one learns the mechanics of instinct, one can alter natural behavior away from the natural center created by natural internal and/or the external social determinism. I do this all the time. I am proof.