Wow, that's going to be a tough one. I guess that might be touching upon the realm of metaphysics where the subjective experience of freedom would be a quale. Even though you might feel/sense/taste it, you could never really explain it to anyone -- successful explanations would just be an illusion, like successfully explaining what 'red' is to an alien. Even if the alien says "ah, yes, now I understand what red is", it's still just guesswork that your 'red' doesn't look green/blue/purple to them.

What I was getting at earlier was that all this 'freedom' talk is like comparing the floor area or "niceness" of a prison built within a prison. Even if the prisoners break the walls down, they're still all stuck in a bigger prison! (Whether it's Pitcairn Island, or planet Earth...) It seems that some people really, really want to avoid facing this fact and insist on some holy grail of true freedom. If you can take a step back and laugh at the absurdity of it all, then I guess that would make you a lot freer than some people.