Free will-
I personally can't subscribe to the concept of free will. The ability to actually author our own thoughts, when you really think about it, would require some kind of magical power rivaling that which is generally attributed to god; omniscience. I don't decide what thoughts pop into my head, they just pop in there. (

Ghostbusters reference!) Say I ask you to think of a city. Any city. First of all, you are limited to the names of cities that you know of. That list is then limited to the names of cities that you can remember. Then here's where free will really falls apart. When I asked you to think of the name of a city, I bet a list of 2-5 cities simply appeared in your head. Out of all the cities you know and remember, why these 3? When did you decide for them to come to the surface of your consciousness? I think if you take a hard honest look at that process, you'll find that you had no freedom here, they simply arrived within your consciousness. Now you might say, well that's just how our brains work, we are limited to the capacity of our brains and we still had the freedom to choose which of those 3. But then again, did you really? There are a million factors that would cause you to choose one, and if you look at each of those factors, you will see there is as little freedom in each of those factors as there was in choosing the original list of contenders. Another though experiment: Consider your favorite genre of music as well as your least favorite genre of music. For me, my favorite would be swing-jazz, while my least favorite is modern pop country. Do you or I have the freedom to choose to reverse these affinities? I can't choose for country to be my favorite while choosing to hate jazz. This is impossible. I could PRETEND that I dislike jazz. I could stop listening to it, and instead listen to country and claim it is my favorite. But deep down, I really prefer jazz and cannot change this.