Jason Isaacs

Acting is a really simple job - it's just hard to do. You just have to be that person with their background in that situation. That's all it is. My kids do it all the time when they're dressing up and playing games.

By irreducibly complex I mean a single system composed of several well-matched, interacting parts that contribute to the basic function, wherein the removal of any one of the parts causes the system to effectively cease functioning.