Some would suggest that complexity and other emergent properties (such as free thought) may come from simple deterministic processes. Wolfram - I think. Others say that it could be an effect of chaos, where small chages in initial state result in large scale differences like free thought. ("Signs of Life" - Ricard Sole) But then again you may be right. They could be looking for a complex solution because (like you and I) they "feel" in control. If there is no free choice, the big question is: why do we feel control? Is this a natural byproduct of life and increased complexity? An evolutionary outcome? If so, what is the benefit if we can't do anything about it? Also, if there is no free choice... I'm glad I'm not aware of it. What a horrible trap this life would be to see everything happen and never feel true interaction. Life would be a prison. So if you ever prove it on paper, I'll believe the formula, but reject it in my everyday life. I may even take up religion.