Originally Posted by guenthar 
In The Witcher 2 the Story is non-linear but the gameplay is linear. There are different forms of linearity in games and they need distinction in order to have clarity.
Exactly. While TES is almost bordering into "The Sims" territory sometimes, Witcher is still very far off from that type of completetly unlinear experiences, it's a lot more focused when it comes to both exploration and gameplay.