From an extensive Geoffrey Hinton interview
"NT: So there's no emotion that couldn't be created? There's no thought that couldn't be created? There's nothing that a human mind can do that couldn't theoretically be recreated by a fully functioning neural network once we truly understand how the brain works?An AI Pioneer Explains the Evolution of Neural Networks | Wired
GH: There’s something in a John Lennon song that sounds very like what you just said.
NT: And you're 100 percent confident of this?
GH: No, I'm a Bayesian, and so I'm 99.9 percent confident.
NT: Okay, then what is the .1?
GH: Well, we might, for example all be part of a big simulation."