Imagine yourself 20 years from now. A brilliant cognitive neuroscientist claims to be able to read your brain and predict your future behavior. She studied with Sam Harris in Los Angeles and then completed her postdoctoral work with Chun Siong Soon and John-Dylan Haynes in Berlin. She knows her stuff and she uses the most advanced technology.
You will be able to press one of five buttons. Before you do so, the neuroscientist will take a scan of your brain, analyse it and predict which button you will choose. She will pay particular attention to the posterior cingulate gyrus and the rostral prefrontal cortex. She is willing to bet you that her prediction will be correct.
If you take the bet, you believe in free will. If you do not, you are a determinist – or in this context a “neuro-determinist.”
Faites vos jeux!
/ Tags: Benjamin Libet
, Free Will
, Uncertainty Principle
The concepts of determinism and freedom are nicely illustrated in a philosophical problem originally invented by William Newcomb, a California physicist. The philosopher Robert Nozick published an analysis of the problem in 1969, and since then it has been widely discussed (Nozick, 1969; Gardner, 1973, 1974, 2001; Drescher, 2005, Chapters 5 and 6; Mark in Malaysia, 2009, summarizes the issues on his webpage).
The basic problem is to decide how to act in the following situation. There are two boxes. The first contains $1000. You can see inside this box: the money is certainly there. The second contains either $1,000,000 or nothing. You cannot see inside this box. You can choose (i) to take both boxes or (ii) to refuse the first box and just take the second. A superior being predicts how you will choose and, before you do so, places in the second box either $1,000,000 if it predicts that you will refuse the first box, or nothing if it predicts that you will take both. The choice must be deliberate: it cannot be made on the basis of some random event such as a coin toss. How do you choose – one box or two?