I just don't think Brad Pitt has the depth to pull off weighty scenes.
He's barely even believable doing a monologue in a perfume ad.
Don't get me wrong. I like him in Seven and Fight Club but it's not because of his acting. It's because he is/was a cool guy; at least before Angelina Jolie got her hands on him.
I invoke my right under the 5th amendment of the United States constitution and decline to answer the question.